Question

A man invested rs 50000 at simple interest in three parts. one third at 6% per annum , one third at 7% per annum. at what rate must he invest the remaining amount so that he earns 8% interest on total amount

Answer 1

B/Q
1/3*50000/100*6+1/3*500*7+1/3*500*x=50000/100*8
166.67*6+166.67*7+166.67x=4000
6+7+x=4000/166.67
x=23.99-13
x=10.99%
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