Ncert solutions

Ncert solutions

Grade 7

Comparing Quantities | Exercise 8.3

Question 10

Q10) What rate gives Rs. 280 as interest on a sum of Rs. 56,000 in 2 years?

Solution:

Here, Principal (P) = Rs. 56,000, Simple Interest (S.I.) = Rs. 280, Time (T) = 2 years

Simple Interest = \frac{P\times R\times T}{100}

\Rightarrow\ 280=\frac{56000\times R\times2}{100}\Rightarrow R=\frac{280\times100}{56000\times2}

\Rightarrow\ R\ =\ 0.25\%

Hence, the rate of interest on sum is 0.25%.

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Question 10

Q10) What rate gives Rs. 280 as interest on a sum of Rs. 56,000 in 2 years?

Solution:

Here, Principal (P) = Rs. 56,000, Simple Interest (S.I.) = Rs. 280, Time (T) = 2 years

Simple Interest = \frac{P\times R\times T}{100}

\Rightarrow\ 280=\frac{56000\times R\times2}{100}\Rightarrow R=\frac{280\times100}{56000\times2}

\Rightarrow\ R\ =\ 0.25\%

Hence, the rate of interest on sum is 0.25%.

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subject-cta
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