Question

1800 amounts to Rs 2250 in 2 1/2 (not 21). The rate per cent is

Answer 1

Solution!!

The concept of simple interest has to be used here. The principal, amount and time is given in the question. We have to find the rate of interest.

Amount = Rs 2250

Principal (P) = Rs 1800

Time (T) = 2½ years = 5/2 years

We will find the interest first.

Amount = Principal + Interest

Rs 2250 = Rs 1800 + Interest

Rs 2250 - Rs 1800 = Interest

Interest = Rs 450

Now let's find the rate of interest.

Interest = (P × R × T)/100

450 = (1800 × R × (5/2))/100

450 = 18 × R × (5/2)

450 = 9 × R × 5

450 = 45R

R = 450 ÷ 45

R = 10

Hence, the rate of interest is 10%.

Answer 2

HEY MATE....HERE'S YOUR ANSWER...!!

Please see the attachment...!!

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NOTE:- This solution is the correct one...in the above solution he took T=3/2 instead of 5/2 that's why his answer came out to be wrong...hope u understand...

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