Ten > Compound Interest

Asked by Basanta · 2 years ago

The annual compound interest on a certain sum for 2 years at 10$\rm \%$ per annum is Rs 420. 

1. Find the sum.
2.  What would be the simple interest on the same sum at the same rate for the same time?
3. Find the ratio between the annual compound interest and simple interest. 
4. By what percent annual compound interest is more than the simple interest?