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MAYANK SHARMA

· started a discussion

· 1 Months ago

what have you done (Question: 112272.0 )

i have not understood really anthing what have you done explain some other methods

Question:
A man invested \(\unicode{x20B9} \)50, 000 at simple interest in the three parts -one third at 6% p.a. one third at 7%. At what rate must he invest the remaining amount so that he earns 8% interest on the total amount?
Options:
A) 9%
B) 10%
C) 11%
D) 12%
Solution:
Ans: (c)

Let total amount 300 \(\div\) 3 = \(\unicode{x20B9} \)300

\(\therefore\) Amount invested in each part = 3 = \(\unicode{x20B9} \)100

Total interest earned = 3 x 8 = \(\unicode{x20B9} \)24

Interest earned from first and second part = 6 +  7 = \(\unicode{x20B9} \)13

Interest to be earned from the third part = 24 - 13 = \(\unicode{x20B9} \)11

This part was invested at 11%

Knowledge Expert

· commented

· 1 Months ago

Dear student,
We have updated the solution.
Keep learning,
Team TR

Pranay SB

· commented

· 1 Months ago

as we have to find rate, we can assume any number (here, he took 300 as it is easily divisible by 3), not necessarily what is given in the question (here, 50,000). Hope you will understand.
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