What will be The Same Principle in 5 years? If

Rs 6000 become Rs 7200 in 4 years at a certain rate of simple interest. If the rate becomes 1.5 times of itself, the amount of the same principal in 5 years will be:

  1. Rs 8000
  2. Rs 8250
  3. Rs 9000
  4. Rs.9250
vijay Professor Asked on 31st July 2015 in Maths.
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1 Answer(s)
Best answer

Answer: (2) Rs.8250
Explanation:-
Given-
Principal = Rs.6000,  Amount = Rs.7200, Time = 4 years    & Rate = ?
Simple Interest = 7220 – 6000= Rs.1200
Formula-
Simple Interest = P x R x T/100
Where, P = principal , R = rate, & T = time.
Then,  1200  = 6000 x R x 4/100
12 = 60 x R /25
R = 5 %
If rate become 1.5 times
Then, Rate = 5 x 1.5
=  7.5 % = 15/2 %
Then, the simple Interest for 5 years,
S I = 6000 x 15 x 5/2 x 100
= 30 x 75
= 2250

Amount = 6000 + 2250
= Rs.8250
Hence, the answer is (2) Rs.8250.

Anurag Mishra Professor Answered on 31st July 2015.
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