Question

On the construction work of a flyover bridge there were 320 workers
initially. The number of workers were increased by 25% every year. Find
the number of workers after 2 years
A shepherd has 200 sheep with him. Find the number of sheeps with him after
3 years if the increase in number of sheeps is 8% every year.
3. In a forest there are 40,000 trees. Find the expected number of trees after 3
years if the objective is to increase the number at the rate 5% per year.
4. The cost price of a machine is 2,50,000. If the rate of depreciation is 10% per
year find the depreciation in price of the machine after two years.
5. Find the compound interest if the amount of a certain principal after two years
is *4036.80 at the rate of 16 p.c.p.a.
6. A loan of 15000 was taken on compound interest. If the rate of compound
interest is 12 p.c.p.a, find the amount to settle the loan after 3 years.
7. A principal amounts to 313924 in 2 years by compound interest at 18 p.c.p.a.
Find the principal
8. The population of a suburb is 16000. Find the rate of increase in the
population if the population after two years is 17640
9. In how many years? 700 will amount to 847 at a compound interest rate of
10 pepa
40. Find the difference between simple interest and compound interest on 20000
at 8 p.o.p.a. Joy two years ?​

Answer 1

Answer:

Number of workers at the start=320

Increased worker in 1 year = 25% of 320

= 25/100*320

= 80

Total workers at the end of 1 year= 320+80

= 400

Number of worker in 2 years = 25% of 400

=25/100*400

= 100

Total no. of workers after 2 years =400+100

= 500