Question

A sum of money amount to rs 6200 in 2 years and 7400 in 3 years. The principle amount is?

Answer 1

$\large\underline{\underline{\sf Given:}}$

• Interest for 2 years = Rs.6200

• Interest for 3 years = Rs.7400

$\large\underline{\underline{\sf To\:Find:}}$

• Principle (P) = ?

$\large\underline{\underline{\sf Solution:}}$

Interest for 1 year :-

$\large\implies{\sf 7400-6200}$

$\large\implies{\sf Rs.1200}$

Interest for 2 years :-

If ,

Interest for 1 year is Rs.1200

•°• Interest for 2 years $\implies{\sf 1200×2 }$

$\large\implies{\sf Rs.2400 }$

Principle :-

Principle = 6200 - Interest for 2 years

$\large\implies{\sf P=6200-2400}$

$\large\implies{\sf P=Rs.38400}$

$\Large\underline{\underline{\sf Answer:}}$

•°• Principle amount is Rs.38400

Answer 2

Answer:

the answer is Rs.3800

Step-by-step explanation:

1st yr principle(simple trick)

3rd yr. - 2nd yr. = 1st yr

so, 7400-6200=1200

next , to get the principle of two yrs ,

1200 * 2 = 2400

now, p=6200-2400=3800

this is the shortcut method!!

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