Question

the principal sum of money becomes 2 times in 5 years on simple interest at certain rate of interest per annum find the time in which the same principal will amount 8 times at the same rate of interest on simple interest​

Answer 1

Answer:

2 times principal =10

si=10×5×1/100

si =1/2

8 time principal of 10= 80

80×5×1/100

si=40