Question

In what time will * 1,28,000 amount to 1,37,842 at
5% p.a., interest being compounded half-yearly?​

Answer 1

P=₹128000

A=₹137842

A=P(1+R/200)²ⁿ

137842=128000(1+5/200)²ⁿ

137842=128000(41/40)²ⁿ

137842/128000=(41/40)²ⁿ

(41/40)³=(41/40)²ⁿ

3=2n

1.5 or 1½ years = answer

Answer 2

Answer:

$1 \frac1{2}$