Maths 7

Instructions

For the following questions answer them individually

Q 1

A sum of money at compound interest doubles itself in 15 years. It will become eight times of itself in?

Q 2

Buses start from a bus terminal with a speed of 20 km/hr at intervals of 10 minutes. What is the speed of a man coming from the opposite direction towards the bus terminal if he meets the buses at intervals of 8 minutes ?

Q 3

If the circumference of a circle is decreased by 50% then the percentage of decrease in its area is:

Q 4

At what rate per cent per annum will a sum of Rs. 1,000 amount to Rs. 1,102.50 in 2 years at compound interest ?

Q 5

What annual payment will discharge a debt of Rs. 6,450 due in 4 years at 5% per annum simple interest ?

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