The ratio of the area of a square to that of the square drawn on its diagonal is :

If the population of a town is 64000 and its annual increase is 10%, then its population at the end of 3 yeas will be :

A bus can cover a distance of 420 km in 7 hours. How much will the speed have to be increased to cover this distance in 6 hours?

(0.04)^-1.5 on simplification gives: 

It takes 53 seconds to cross a pole at the end of a 110-meter-long train with a speed of 36 km / h. Find the initial distance of the pole from its front end.

If a + b = -2 and a - b = 12, find b. 

Present ages of Sameer and Anand are in the ratio of 5 : 4 respectively. Three years hence, the ratio of their ages will become 11 : 9 respectively. What is Anand's present age in years?

A and B invest in a business in the ratio 3:2. If 5% of the total profit goes to charity and A’s share is Rs.855, the total profit is: