Question

₹3750 amount to ₹4260 in 3 years at simple interest. Find:
1) rate of interest
2) the amount of ₹7500 in 5½ years at the same rate of interest.

Answer 1

Hey there! ☺☻☺

Given,
Principal = P = Rs. 3750
Rate = R = ?
Time = T = 3 yrs
S.I = 4260 - 3750 = Rs. 510

1) S. I = P*R*T/100
    510 = 3750 * R * 3/100
    R = 510 * 100/3750 * 3
     R = 4.53%

2) Amount = A = Rs. 7500
Time = T = 5 1/2 yrs
Rate = R = 4.53%
S.I = P*R*T/100
     = {7500*4.53*5 1/2}  / 100
     = 15 * 453 / 4
     = 849.25

Now,
A = P + SI
   = 7500 + 849.25
   = Rs. 8349.25 

Hope It Helps You!

Answer 2

Principal = 3750 ₹

TIME = 3 years

RATE = ?


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☆ S. I = > 4260 - 3750 = 510

----------------------–-

S. I = P * R * T ÷ 100


510 = 3750 * R * 3 ÷ 100

R = 510 * 100 ÷ 3750 * 3

R = 4. 53 %


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☆ AMOUNT

* AMOUNT = 7500 ₹

* TIME = 51 ÷ 2 y

* RATE = 4. 53 %


________________________



S. I = P * R * T ÷ 100

= { 7500 * 4. 53 * 51 / 2 } ÷ 100
= 15 * 453 ÷ 4
= 849. 25






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AMOUNT = P + S I

=> 7500 + 849. 25
=> 8349. 25