Question

There is 60% increase in an amount in 6 year at simple interest. What will be the compound interest of ₹ 12000 after 3 years at the same rate?

पर्याय

• ₹ 2160

• ₹ 3120

• ₹ 3972

• ₹ 6240

Answer 1

₹ 3972

Explanation :

Let P = ₹ 100.

Then, S.I. = ₹ 60 and T = 6 years.

∴ R = `((100 xx 60)/(100 xx 6))` = 10% p.a.

Now, P = ₹ 12000, T = 3 years and R = 10% p.a.

∴ C.I. =  `₹[12000xx{(1 + 10/100)^3 - 1}]`

= `₹(12000 xx 331/1000)`

= ₹ 3972.