Question

At what rate percent per annum simple interest, will a certain sum of money becomes double in 10 years?​

Answer 1

Answer:

rate =20%

Step-by-step explanation:

SI=2P

P=P

T=10

R=?

let rate be x

a/q

2P=PxRxT/100

2P/P=Rx10/100

2=R/10

R=2x10

R= 20%

Answer 2

Principle = P

R = ?

T = 10 years

Simple Interest= PRT/100

For the money to double, Interest=Principle amount = P

P = PRT/100 ——————> P= PR×10/100

R= 10%

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