Question

Q.17. Vrunda deposited 75,000 in a bank at the rate of 8 p.c.p.a. for some years and at the end of the period, she received 80,500. For how many years had she deposited her money ? ​

Answer 1

Given :

• Principal (P) = 75000

• Rate of Interest (R) = 8%

• Total amount = 80,500Rs.

To find :

• Time .

___________________

Total Interest (I) = Total amount - ( P ).

= 80500 - 7500

= 5500 Rs.

____________________

Time = $\huge\frac{I×100}{P×R}$

= $\huge\frac{5500×100}{75000×8}$

= $\huge\frac{550}{75×8}$

= $\huge\frac{11}{120}$

= 10 years .

Answer 2

$\sf\red{Total\: amount - Principal}$

$\longrightarrow$$\sf\red{80,500-75000}$

$\longrightarrow$$\sf\red{Rs.5500}$

$\sf\pink{Time = \frac{I×100}{P×R}}$

$\longrightarrow$$\sf\pink{\frac{5500×100}{75000×8}}$

$\longrightarrow$$\sf\pink{\frac{550}{75×8}}$

$\longrightarrow$$\sf\pink{\frac{11}{120}}$

$\longrightarrow$$\sf\pink{10\: years. }$