Question

If Rs 80 amounts to Rs 140 in 4 years, what will Rs 96 amount to in 10 years at the same rate of interest per annum?

• A. Rs 276
• B. Rs 306
• C. Rs 386
• D. Rs 300

Answer 1

Answer: (A)

Rs 276

Case I
When, P = 80, A = 140, SI = 140 - 80 = 60, R = ?, T = 4
R = $\frac{60X100}{80X4}$ = $\frac{75}{4}$% ( R = $\frac{SIX100}{PXT}$)
Case II
P = 96, R = $\frac{75}{4}$% T = 10, SI = ?, A= ?
SI = $\frac{96}{100}$ X $\frac{75X10}{4}$ = 180
A = 180 + 96 = 276