Question

If Rs 640 amounts to Rs 768 in 2 years 6 months, what will Rs 850 amount to in 3 years at the same rate per cent per annum?

Answer 1

P=Rs. 640, A=Rs. 768, T=2 years 6 months $=\frac{5}{2}$ years

S.I.= A−P

= 768−640

= Rs. 128

$R=\frac{S.I\times 100}{P\times T}$

$=\frac{128\times 100\times 2}{640\times 5}$

= 8%

P=Rs. 850, R=8%, T=3 years

$\therefore$ $S.I.=\frac{P\times R\times T}{100}$

$=\frac{850\times 8\times 3}{100}$

= Rs. 204

$\therefore$ A=P+S.I.

= 850+204

= Rs. 1054