Question

in how many years the sum of rupees 1200 become rupees 1800 at the rate of simple intrest of 5% per annum​

Answer 1

Using .. SI = Amount - Principle

⠀⠀⠀⠀= 1800 - 1200

⠀⠀⠀⠀= 600

now using .. SI = P × R × T / 100

( P = Principle , R = Rate , T = Time )

= 600 = 1200 × 5 × T / 100

600 = 12 × 5 × T

600 = 60 × T

T = 600 / 60

T = 10 .

Therefore in 10 years the sum of rupees 1200 becomes rupees 1800 at the rate of SI which is 5% / annum.

hope it helps you..