SSC CPO SI and ASI 2015 Paper

Question : 149 of 199

Marks: +1, -0

A and B borrowed Rs.3000 and Rs.3200 respectively at the same rate of interest for

2 1/ 2

years. If B paid Rs.40 more interest than A, find the rate of interest.

Solution:

(3) Let the rate of interest be r%.
Then difference in interest is,

\ {3200 × 5 \×r}/{100× 2}-\ {3000 × 5 × r}/{100× 2}=40

80 r-75 r=40 \⇒ r=\ {40}/{5}=8 \%

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