A) 3.5 percent
B) 4 percent
C) 3 percent
D) 4.5 percent
Correct Answer: C
Solution :
Let the rate of interest be R% per annum. \[\text{S}\text{.I}\text{.= }\frac{\text{Principal }\!\!\times\!\!\text{ Time }\!\!\times\!\!\text{ Rate}}{\text{100}}\] \[\therefore \]\[\frac{10800\times 3\times R}{100}+\frac{7500\times 2\times R}{100}\] \[=1422\] \[\Rightarrow \]\[324R+150R=1422\] \[\Rightarrow \]\[474R=1422\] \[\Rightarrow \]\[R=\frac{1422}{474}=3%\]per annum.You need to login to perform this action.
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