RRB Assistant Loco Pilot and Technician Model Paper 9 with solutions

Question : 23 of 100

Marks: +1, -0

A sum of ₹12,000, deposited at compound interest becomes double after 5 years. How much will it be after 20 years ?

Solution:

(d) A = P

( 1 + { { R } } /{ 100 } ) ^ { { T } }

⇒ 24000 = 12000

( 1 + { { R } } /{ 100 } ) ^ { { 5} }

⇒ 2 =

( 1 + { { R } } /{ 100 } ) ^ { { 5} }

⇒

2^4= ( 1 + { { R } } /{ 100 } ) ^ { { 20} }

= 16 times
i.e. The sum amounts to ₹ 192000.

Go to Question:

Prev Question

Next Question