1.

A certain sum of money lent at compound interest become 7396 in two years and 7950.70 in 3years

Answer»

Answer:

RATE of Interest ROI = 6400

Step-by-step explanation:

AMOUNT in 3years = Rs 7950.70 

Amount in 2 years= Rs 7396.00 

Interest for 3rd year =Rs 554.70 

Principal for 3rd year=Rs 7396 

TIME = 1year 

Rate = (Interest *100)/ Principal*Time 

= 554.70*100 /7396* 1 

= 55470/ 7396 = 7.5% 

Let sum of money = X 

Amount = Rs 7396 

Time = 2 years 

then Amount = Principal(1+R/100)^T 

7396 = x (1+7.5/100)^2 

x =Rs 7396 /(43/40)^2 

=Rs 7396 *40*40 /43*43 

=Rs 6400



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