The value of x in the given equation
$$ {23 ^2 + \sqrt{x}=625}$$

The pipe can fill a tank in 36 minutes and the another pipe can empty it in 45 minutes. If both pipes are opened simultaneously, the time (in hours) it takes to fill half the capacity of the tank is:

If 20 women can lay a road of length 100m in 10 days. 10 women can lay the same road of length 50m in: 

Two numbers are more than the third number by 20 % and 50 % respectively. Find the first number is what percent of the second number? 

A sum of Rs. 12,000, deposited at compound interest becomes double after 5 years. How much will it be after 20 years? 

A trader had 16 quintals of wheat. He sold a part of it at 17% profit and the rest at 27% profit, so that he made a total profit of 21%. How much wheat did he sell at 27 % profit? 

Three numbers which are co-prime to one another are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is: 

(0.04)^-1.5 on simplification gives: