1.

A sum of money at the simple interest amounts to ₹5852 in3 years and ₹7788 in 7 years. What is the rate of interest per annum?

Answer»

a) 8
b) 9
c) 1
d) 11

Solution :Let SUM = ₹A and interest rate = r%
` A + (A xx r xx 3)/100 = 5852`
` A( 1 + (3r)/100)= 5852`
` A + ( Axxr xx 7)/ 100 = 7788`
` A ( 1 + ( 7R)/100) = 7788`
From equation (i) and (ii), r=11%


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