A rectangle is 14 cm long and 10 cm wide . If the length is reduced by x cms and its width is increased also by x cms so as to make it a square, then its area changes by :

A Zoo keeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the...

When a student weighing 45 dgs left a class , the average weight of the remaining 59 students increased by 200...

If 18 is 15 percent of 30 percent of a certain number , what is the number ?

Average cost of 5 apples and 4 mangoes is 36 taka. The Average cost of 7 apples and 8 mangoes is 48 taka. Find...

If n and p are both odd numbers, which of the following must be an even number ?

The present ages of A and B are in the ratio 6 : 4. Five years ago their ages were in the ratio 5 : 3. Find th...