At some rate of simple interest, A lent Rs.6,000 to B for 2 years and Rs.1,500 t

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At some rate of simple interest, A lent Rs.6,000 to B for 2 years and Rs.1,500 to C for 4 years and received Rs.9,00 as interest from both of them together. The rate of interest per annum was

Options:

A . 6%

B . 5%

C . 10%

D . 8%

Answer: Option B
Answer: (b)Using Rule 1,If rate of interest be R% p.a. then,SI = ${\text"Principal × Rate × Time"/100$${6000 × 2 × R}/100 + {1500 × 4 × R}/100$= 900120 R + 60R = 900180R = 900R = $900/180$ = 5%

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