For the following questions answer them individually
What is the sum which earns Rs. 420 as compound interest in second year at the annual interest rate of 5% ?
5 years ago, average age of P and Q was 15 years. At present, average age of P, Q and R is 20 years. What will be the average age after 10 years ?
Exterior angle of a regular polygon is 72. What would be the sum of its interior angles ?
Under Union Plan, the purpose of requisition of land for nuclear plant, the following word is written in place of amendment in Atomic Energy Act ?