Question

in how many years will rs. 7200 amount to rs. 9360 at 15by 2 %per annum​

Answer 1

$\huge{\boxed{\bf{Question:-}}}$

In how many years will ₹7,200 amount to ₹9360 at ${7}\frac{1}{2}$ % p.a.

$\huge{\boxed{\bf{Solution:-}}}$

Let the time( t ) = ${x}$ years

Amount ( P ) = ₹7,200

Interest ${( I )}$ = ₹(9360-7200)

= ₹2,160

rate of interest ( r ) = ${7}\frac{1}{2}$ % p.a.

${\boxed{\bf{{I}=\frac{P×r×t}{100}}}}$

${2160}=\frac{7200×7.5×x}{100}$

${2160}={72×7.5×x}$

${x}=\frac{2160}{540}$

${x}={4}$

$\huge{\boxed{\red{\bf{Answer:-}}}}$

The sum will amount to ₹9,369 in 4 years.