Question

In how many years will sum of money double if rate or interest is 20%p.A.?

Answer 1

Answer:

5 years

Step-by-step explanation: simple interest at 20 % per anum is 20 rs. if the principal amt is 100 rs. so the amount to become double i.e. 200 simple interest must be 100 so that sum may become 100+100=200

so in 5 years the simple interest is 20*5=100

ans is 5 years