Question

a sum of money invested at 5% p.a amounts to rs. 900 in 4 years. How much would it amount to in 8 years at 6.25% p.a​

Answer 1

Step-by-step explanation:

1

Secondary SchoolMath 8 points

At what rate percent per annum will a sum of money double in 8 years.

A) 12.5%

B) 13.5%

C) 11.5%

D) 14.5%

Ask for details Follow Report by Pand4kakeshG9a 29.06.2016

Answers

prachi7742

prachi7742 Ace

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mysticd

mysticd Genius

Answer:

Option (A)is correct

Step-by-step explanation:

Let the Principal=P

Time(T)=8years

Let Rateofinterest=R%

Amount(A)=2P

/*Weknow that,

\boxed {A =P \big(1+\frac{TR}{100}\big)}

\implies 2P = P\big(1+\frac{8R}{100}\big)

\implies 2 = \big(1+\frac{8R}{100}\big)

\implies 2-1= \big(\frac{8R}{100}\big)

\implies 1= \big(\frac{8R}{100}\big)

\implies \frac{100}{8}= R

\implies R = 12.5\%

Therefore,

Rateofinterest(R)=12.5%

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