Question

If certain sum is doubled in 8 yr on simple interest, in how many years will it be 4 times? (a) 24 (b) 16 (c) 32 (d) 12​

Answer 1

Answer:

a- 24

Step-by-step explanation:Let the principle be 100.

Then amount will be 200.when doubled

Interest= 100

Time = 8 yrs

R=?

I=PRT/100

100=100*R*8/100

100*100/100*8=R

100/8=R

NOW SUM SHOULD BE 4 TIMES MEANS 400

MEANS INTEREST ON 100 IS 300.

I=PRT/100

300=100*100/8*T/100

300*8/100=T

24= T

IN 24 YEARS SUM WILL BECOME 4 TIMES OF PRINCIPLE.

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Answer 2

Answer:

the answer is a) 24 years

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