A thief is capable of running 20kms a day. A policeman who is to catch the thief can run 1km on the 1st day, 2kms on the 2nd day and so on. Then how long will it take the policeman to catch the thief?

moveon

 Profile Answers by moveon Questions by moveon

• Nov 5th, 2009

A thief can run 20 kms a day.Let thief be catched in x daysso total km is 20*xkm run by policeman 1+2+3+4.........+x is an A.P is x(x+1)/2equating both20*x=x(x+1)/2x=39

navateja

 Profile Answers by navateja Questions by navateja

• Jul 25th, 2009

Let the no. of days needed is x.In x days, the theif runs 20x kms.On day 1, police runs 1km.On day 2, he runs 2 kms.Similarly, on the xth day, he runs x kms.In the entire x days, police runs (1+2+3+.....

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A man bought some horses, cows and goats. They were 100 in number(totally). If it costed Rs.100 to buy those 100 animals and the cost of a horse, a cow and a goat was Rs.10,Rs.3, 50 paise respectively,how much horses goats and cows did he buy?

Kartik Kandiwalsa

• Jul 30th, 2017

X be horses, y be cows, z be goats
According to given condition
x+y+z=100
10*x+3*y+0.5*z=100
Subtracting eqn 1 from eqn 2
19*x+5*y=100
Only possible integers values are x=5 and y=1
Hence z=94
So 5 horses 1 cow and 94 goats

shiva

• Apr 27th, 2017

4 Rs. 1 Book
25 p. 1 Pencil
50 p. 1 Pen

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