Question

If P = ₹ 100, R = 20%, A = ₹ 140 then find time ​

Answer 1

Given :

• P = ₹100
• R = 20%
• A = ₹140

To find :

Time

Formula used :

1. A = I + P
2. I = PRT/100

Here

• A = Amount
• I = Interest
• P = Principal
• R = Rate
• T = Time

Solution :

First of all we need to find out interest.

➝ A = P + I

➩ ₹140 = ₹100 + I

➩ I = ₹140 - ₹100

➩ I = ₹40

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Now , using I = PRT/100, we will find out time

$\sf \implies \: 40 = \dfrac{100 \times 20 \times T }{100}$

$\sf \implies \: 40 = \dfrac{2000 \times T }{100}$

$\sf \implies \: 40 = 20 T$

$\sf \implies \: T \: = \: \dfrac{40}{20}$

$\sf \implies \: T \: = \: 2$

Therefore, Time = 2 years

ANSWER : 2 years