Question

amit borrowed rs15000 for 2yrs and rs10000 for 1yrs from bank at the same rate of interest .In addition to the principal amount amit has to give bank an interest amount of rs 4000. find the rate of interest.

Answer 1

Si=p×r×t/100

a/q

15000×2×r/100+10000×1×r/100=4000
300r+100r=4000
400r=4000
r=4000/400
r=10

the rate is 10%