Q91 of 96 Page 287

The population of a town was decreasing every year due to migration, poverty and unemployment. The present population of the town is 6,31,680. Last year the migration was 4% and the year before last, it was 6%. What was the population two years ago?

Given that, present population = 631680, last year migration rate = 4% and year before last migration rate = 6%.

Comparing the situation with -



⇒ population two years ago = P, present population of town = A, R1 = 4% and R2 = 6%.




⇒ P = 700000


More from this chapter

All 96 →
89

Find the difference between Compound Interest and Simple Interest on Rs 45,000 at 12% per annum for 5 years.

 90

A new computer costs Rs 1,00,000. The depreciation of computers is very high as new models with better technological advantages are coming into the market. The depreciation is as high as 50% every year. How much will the cost of computer be after two years?

 92

Lemons were bought at Rs 48 per dozen and sold at the rate of Rs 40 per 10. Find the gain or loss per cent.

 93

If the price of petrol, diesel and LPG is slashed as follows:


Complete the above table.