Question

What sum of money should be invested in 5 years at 8% p.a. to earn the same interest as ₹3600 at 10%p.a. for 4 years?

Answer 1

the two simple interest are same so equate both
I think it helps u
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Answer 2

➡️ Here, 1st case

T = 5 years

R = 8% p. a.

I = Rs. 3600

P =?

Now,

I = P*T*R / 100

or, 3600= P*5*8 / 100

or, 360000=40P

or, 360000 / 40 = P

Therefore, P = Rs.9000

Again, 2nd case

R = 10% p.a.

T = 4 years

I = Rs. 3600

P =?

Now,

I = P*T*R / 100

or, 3600 = P*4*10 / 100

or, 360000 = 40P

or, 360000 / 40 = P

Therefore, P = Rs.9000 Ans...