Question

what sum will amount to rs 6600 in 2 year at 10% per annum simple interest ?

Answer 1

Let
P=100

R=10%
Time=2yr

Amount =6600


Si=pxrxt /100

=100x10x2/00=20

Amount = principal + interest

=100+20=120

According to the question it is 6600

1 unit assumed =6600/120

=55


Then sum or principal =100x55=5500

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Answer 2

Given,

Simple interest = Rs. 6600

Rate (R) = 10% per annum

Time (T) = 2 years

To find,

The principal amount (P).

Solution,

The principal amount (P) will be Rs. 33000.

We can easily solve this problem by following the given steps.

According to the question,

Simple interest = Rs. 6600

Rate (R) = 10% per annum

Time (T) = 2 years

We know that the formula to find the simple interest is given as follows:

Simple Interest (SI) = Principal(P)×Rate(R)×Time(T)/100

6600 = P×10×2/100

Using the cross multiplication method,

(6600×100) = P×20

P×20 = (6600×100)

P = (6600×100)/20 [20 was in the multiplication on the left-hand side. So, it is in the division on the right-hand side.]

P = Rs. 33000

Hence, the principal amount is Rs. 33000.