Question

12. At a certain rate of simple interest, 1600 becomes 2200 in 4 years. What sum of money
will become 5025 in 4 years and 9 months at the same rate of interest?​

Answer 1

R=?

P= Rs 1600

A=2200

T=4yrs

S.I.=Rs(2200-1600)= Rs 600

S.I=PRT/100

600=(1600×4×R)/100

600=64R

R=600/64

R=9.375%

Now,P=?

A=5025

T=4 yrs 9 months=19/4yrs

R=9.375%

S.I= Rs 5075-P

5075-P=(P×9.375×19)/400

2030000-400P=178.125P

2030000=578.125P

P=2030000/578.125

P= Rs 3511.35