Question

A a sum amount to rupees 2400 at 15% simple interest per annum after 4 years
. find the sum

Answer 1

Answer:

$:\implies\tt Amount=Principal+SI\\\\\\:\implies\tt 2400=Principal+\dfrac{Principal \times Rate \times Time}{100}\\\\\\:\implies\tt 2400=Principal+\dfrac{Principal \times 15 \times 4}{100}\\\\\\:\implies\tt 2400=\dfrac{100Principal + 60Principal}{100}\\\\\\:\implies\tt 240000 = 160Principal\\\\\\:\implies\tt \dfrac{240000}{160} = Principal\\\\\\:\implies\underline{\boxed{\textsf{\textbf{Principal = Rs. 1500}}}}$