Simple Interest Practice Test 2

Question : 36 of 40

Marks: +1, -0

A lady borrowed Rs 800 at 4 % per annum SI and Rs 900 at 5% per annum on the condition that the whole sum will be returned only when the total interest becomes Rs 231. Find the number of years after which the lady has to return the sum.

3.5 years
3 years
4 years
5 years
6 years

Validate

Solution:

Let the time be x years.

∴231=({800×4×x}/100)+({900×5×x}/100)

231=3200/100x+4500/100x

231=77x

3=x

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