Question

a sum become rs. 500 in 5 years and rs. 600 in 7 years at a certain rate percent per annum at simple interest. what is the sum?​

Answer 1

Answer:

Let the sum borrowed be Z. Then,

(Zx6x2⁄100) + (Zx9x3⁄100) + (Zx14x4⁄100) = 11400

Therefore, 3Z⁄25 + 27Z⁄100 + 14Z⁄25) = 11400

? 95Z⁄100 = 11400

Z = (11400x100⁄95) = 12000