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Find the Speed
An Engine length 1000 m moving at 10 m/s. A bird is flying from engine to end with x sec and coming back at 2x sec. Take total time of bird traveling as 187.5s. Find the to and fro speed of the bird.
Yongjie Liang
- Jul 19th, 2023
support time cut ratio 1:2, suppose that bird from begining to end fily 62.5s, so the train will levave 1000-625=375 m behind the original point. bird needs 375/62.5=6m/s will hit the end. now move t...
Sandhya.Kishan
- May 28th, 2012
Distancetravelled by the bird=2000m
time taken=187.5 sec
=375/2 sec
speed is in the ratio of 1:2
dividing the time in the ratio of 1:2
time to=375/2(2/3)=125 sec
speed=distane/time=1000/125=8 m/sec
speed in thefro direction=16m/sec -
Questions Selection
There are 3 Sections with 5 questions each. If three questions are selected from each section, then in how many ways this selection can be done?
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Price of a Book
If the list price of a book is reduced by Rs. 5, then a person can buy 5 more books for Rs. 300. The original cost of the book is (1) Rs. 15(2) Rs. 20(3) Rs. 25(4) Rs. 30
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Circle Circumference
There is a point P on the circle. A and B started running in two constant different speeds. A in Clockwise and B in Anti-clockwise. A meet B First time 500m in Clockwise from P then second time 400m Anti-clockwise from P. B is yet to complete one round, What is the circumference of the circle?
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1/3+1/5+1/x=1/8 , find x
vidhyaraj
- Sep 19th, 2013
120/49
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Subject Marks
There are 5 Sub with equal high marks. Mark scored by a boy is 3:4:5:6:7 (Not sure). If his total aggregate if 3/5 of the total of the highest score, in how many subjects has he got more than 50%?
Tanvi
- Nov 17th, 2012
It is cleanly mentioned in question that he has scored 3 subjects
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Prime Numbers
What is the probability of getting 2 prime nos. from 1 to 20?
Mark Haynes
- Feb 13th, 2012
I hit the send before I was finished, to continue: since the random picking of a number under 20 is still a independent event, the chance for picking a 2nd prime number is still the same... 40%
Mark Haynes
- Feb 13th, 2012
Given that there are 8 Prime Numbers under 20, and if the limit is only random numbers under 20 then there is a 40% chance of getting a prime number.
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A meets B
A, B and C starts from a point on a circle. A and B goes clockwise and C anticlockwise. A meets C after 88s B meets C after 110s. After how many seconds A meets B ?
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Seat Arrangement
How many types can arrange to seat 4 men & 4 woman on a circuler table alternate?
ytk.. di!
- Jan 29th, 2012
3! x 4! = 144
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Who is Taller
There is a 20 X 20 array. In Each row, the shortest person is called and among them, the tallest person is A. In Each column, the shortest person is called and among them, the tallest person is B. Who is taller?
deadaf
- Jan 21st, 2012
A is taller
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What is the Amount Paid?
A, B, C, D went to a hotel and planned to share the bill equally. But afterwards they changed their plan and to pay proportional to consumption A paid 240, B & C paid equally, D paid only half the amount that he should have paid based on the first plan. What is the amount paid by B?
sivaraj6389
- Jan 20th, 2012
Total(x)=240+x/4+x/4+x/8(a+b+c+d)
x=(1920+2x+2x+x)/8
8x=1920+5x
8x-5x=1920
3x=1920
x=640
Amount paid by b=x/4=640/4=160srikanth
- Sep 30th, 2011
120
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If a factory manufactures 7200 bottles in 1 hour, how much does it manufactures in 1 second?a)120b)2C)1200d)60
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Orange Pulp
Juice contains water and orange pulp in the ratio of 3:1. For making 12l juice, How much Orange pulp will be required?
tryforpavan05
- Dec 17th, 2010
in 1 lt.. of juice 3/4th of water is present and 1/4 of orange...in 12 lt.. of juice 9lt of water and 3 lt of orange is present hence 3 pulps of orange are req for 12 lt juice :)
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Max Intersections
There are 11 lines in plane. How many intersections (Maximum) can be made?
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Address Probability
What is the probabiltity of writing correct addresses to 4 letters to be posted?
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Estates Will
A Father is willing his estates like this. If a boy is born, wife has 1/3 part and remaining for boy. If a girl is born, Wife has 2/3 and remaining for the girl. But twins (Boy + Girl) are born. What is the share that the daughter would get?
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Swimming People
All persons know either swimming or rowing. There are 14 persons who know only swimming and 14 persons who know only rowing. 8 tickets sold for rowing. How many people are there for swimming?
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How to solve questions which involves arthematic operations on alphabets like xxxx yyyy +zzzz====== yxxxz======
SRINIVAS_SRIT
- Jul 18th, 2007
R4 R3 R2 R1 x x x xy y y y+ z z z z-------------------------------...
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how many 9 digit no.s are divisible by 7
a.1256b.1986c.1524d.1874
pravesh28
- Mar 28th, 2010
The 100000 first 9 digit number First number divisible by 7 is 1000006 (First term) Greatest 9 digit number is 9999999 and divisible by 7 is 9999997 (nth term) 9999997 equals 1000005+(n-1)7 Solving we get n equals 1285714
suchintya
- Jun 13th, 2008
128571428 is the correct answer that i copied from the above. But i apreciate that........Cheers
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