Selling a car gains 25% on sp. What %gain on cp?

A) 15b) 25c) 33.33d) 47.5

Answered by: Nagaiahgari Balaji on: Nov 3rd, 2009

If suppose sp is 100% (assume)

Then gain % is 25%..

Then subtract it from sp we will get cp i.e 100-25=75%.

We know two basic formulas %gain=(gain/cp)*100 . or %loss=(loss/cp)*100.

So %gain=(25/75)*100=33.33

-Balue

Answered by: amrittandon88 on: Sep 3rd, 2009

Let SP be 100

so 25 is the profit now
so 75 is the CP
so (25/75)*100=33.33% is the gain on CP

A certain number of men can finish a piece of work in 10 days. If however there were 10 men less it will take 10 days more for the work to be finished. How many men were there originally?(a) 110 men(b)...

Answered by: prince.goyal on: Nov 16th, 2009

x*10=(x-10)*(10*2)

10x =20x-200
20x-10x=200
10x=200
x=20

check it if any step is wrong

Answered by: anand3186 on: Jul 16th, 2009

Let no of men  = x.
x men can do a piece of work in 10 days.
so, 1 man can do it in 10*x days.
Now (x-10) men do the work in 20 days.
so, 1 man ... in 20*(x-10).
so, 20(x-10) = 10x.
so, x = 20.
Ans is option (d).

After 10 years a will be twice the age of b before 10 years.And now if the difference is 9 years between them then what is the age of b after 10 years

49a

Answered by: pktamilselvi on: Jan 10th, 2011

A's age=9, B's age=38

Answered by: mdeulkar on: Dec 20th, 2009

Let present ages be 'a' and 'b'.
after 10 yrs A's age will be  a+10
and that of B will be b+10

age of B before 10 yrs  = b-10

so given condition is
a+10=2(b-10)

second condition is
a-b=9

solving these two equations we get
b=39

so after 10 yrs B's age will be 39+10=49