Rs.320 becomes Rs.480 at a certain rate of interest compounded annually in 4 years. Find the amount at the end of 16 years.
Answer & explanation
Correct answer: option 2
Principal : Amount
4yrs: 320 : 480
4yrs: 2 : 3
8yrs: 22 : 32
12yrs: 23 : 33
16yrs: 24 : 34
16 : 81
⇓× 20 ⇓
320 ⇓× 20
1620/-