Question

plz solve:
rupees 12,000 is invested for 1½ years at compound interest. If rupees 15,972 is received at the end of this period find the rate of interest per annum.​

Answer 1

principal = Rs 12000

amount = Rs 15972

: simple interest =( amount - principal)

= Rs 15972 - 12000

= Rs 3972

principal = Rs 12000

time = 1 1/2 = 3/2 = 1.5 year.

simple interest = Rs 3972

Rate = SI × 100

P× R

= 3972 × 100 × 10

12000 × 15

= 331

15

= Rs 22.06