9. The simple interest on a sum of money for 2 years at 4% per annum is 340. Find :(a)the sum of money.(b)the compound interest on this sum for one year payable half yearly at the same rate.At what rate per cent compound interest per annum will 6250 amount to 7790 in 2 ore10.

9. The simple interest on a sum of money for 2 years at 4% per annum

1.	9. The simple interest on a sum of money for 2 years at 4% per annum is 340. Find :(a)the sum of money.(b)the compound interest on this sum for one year payable half yearly at the same rate.At what rate per cent compound interest per annum will 6250 amount to 7790 in 2 ore10.
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