Question

15. A sum of money at interest amount to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is [2013] (a) Rs. 650 (b) Rs. 690 (c) Rs. 698 (d) Rs. 700​

Answer 1

option (c)698 is the right qnswer

Step-by-step explanation:

Given that a sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years.

So, amount after 4 years = amount after 3 years + simple interest in one year

Therefore, simple interest in one year =854−815=Rs. 39

So simple interest for 3 years will be =39×3=117 Rs.

The initial sum of money amounts to be Rs. 815 in three years with simple interest. Therefore the principle is = amount - interest=815−117=698 Rs.

Therefore, the sum is Rs.698

Answer 2

Sum of money + 3 year interest= 815

Sum of money + 4 year interest =854

Interest Amount Per year =854-815

=39

Interest for 3 years = 39*3 = 117

Sum of money = 815-117

Answer - (c) 698