Answer :

Case 1:

Amount = Principal + Interest

P = p, r = ?, t = 7 yrs and I = I

As we know,

⇒ Rs. 7100

Case 2:

P = p, r = ?, t = 4 yrs and I = I

As we know,

Amount = Principal + Interest

⇒ Rs. 6200 = p +

Dividing the above equations we get,

⇒ 7100 + 284r = 6200 + 434r

⇒ 900 = 150r

To find the value of principal putting the value of r in any equation

⇒7100 =

⇒ p = = Rs. 5000

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