Question

In How much time rupees 600 will become rupees 800 with 5% simple interest

Answer 1

Principal =600 ₹
Amount =800₹
Simple Interest =Amount -Principal
=800-600₹
=200₹
Rate =5% per annum
Time =(Simple Interest *100)÷(principal *rate)
=(200*100) ÷(600*5)
=20000÷3000
=20÷3 years
=6years 8 months


This answer is if the rate of interest is annualy

Answer 2

Answer:

Let the original rate be R percent per year, the principal amount be P, time T

Given is SI = 600 = P * R * 10 / 100

Hence P*R = 6000

SI for first five years will be 300 at the end of first 5 years.

When P is trebled for next five years, the SI for those five years will be = 3P * R * 5 / 100 = [ 15* P * R ] /100 = [ 15 * 6000 ] / 100 = 900

Hence the total interest will be 300 + 900 = 1200