At a certain rate of simple interest, a certain sum doubles itself in 10 years. It will triple itself in ________________

1000 workers were employed to construct a river bridge in four years. At the end of first year, 10% workers were retrenched. At the end of second year, 5% of the workers at that time were retrenched . However to complete the project in time the number of workers was increased by 10% at the end of third year. How many workers were working during the fourth year?

The present price of a scooter is Rs 7290. If its value decreases every year by 10%, then find its value before 3 years.

Find the amount if Rs 2500 at rate of interest 6 %  when time period is 1 year 4 months. The amount is compounded annually

In how much time will a sum of Rs 1600 amount to Rs 1102.50 in 2 years at compound interest?

At what rate percent will a sum of Rs 1000 amount to Rs 1102.50 in 2 years at compound interest?

Find the rate per annum if Rs 2000 amount to Rs 2662 in years, interest being compounded half-yearly?

At what rate percent compound interest per annum will Rs 640 amount to Rs 774.40 in 2 years?

If a simple interest Rs.72 wil be obtained after 6 months at the rate of 3 per cent per annum ,then the principal amount would be ___________________

The bacteria in a culture grows by 10% in the first hour, decreases by 10% in the second hour and increases by 10% in the third hour.If the original count of the bacteria in a sample is 10000, find the bacteria count at the end of three hours.

A new car costs Rs 360000. Its price depreciates at the rate of 10% a year during the first two years and at the rate of 20 % a year thereafter . What will be the price of the car after 3 years?

Find the compound interest on Rs 24,000 at 15% p.a for years.

The compound interest on Rs 1800 at 10% per annum for a certain period of time is Rs 378. Find the time in years.

At what rate percent per annum will a sum of Rs 4000 yield compound interest of Rs 410 in 2 years?

Mr.Mittal finds that an increase in the rate of interest from per annum increases his yearly income by Rs.250 His investment is

The bacteria in a culture grows by 10% in the first hour, decreases by 10% in the second hour and increases by 10% in the third hour.If the original count of the bacteria in a sample is 10000, find the bacteria count at the end of three hours.

The cost of a T.V set was quoted Rs 17000 at the beginning of 1999. In the beginning of 2000 the price was hiked by 5%. Because of decrease in demand the cost was reduced by 4% in the beginning of 2001. What is the cost of the T.V. set in 2001?

An amount of 12000 is deposited in a bank at 10% p.a for 2 years and 6 months compounded per annum. Find the value of the relation

In what time will Rs 4400 become Rs 4576 at 8% per annum interest compounded half-yearly?

Find the rate at which a sum of money will double itself in 3 years, if the interest is compounded annually.