A lent TK. 5000 to B for 2 years and TK. 3000 to C for 4 years on simple interest at the same from both of them as interest . The rate of interest per annum is :

A lent TK. 5000 to B for 2 years and TK. 3000 to C for 4 years on simple interest at the same from both of them as interest . The rate of interest per annum is : Correct Answer 10%

We know , prn100 + p1r1n1100  = 2200⇒5000×r×2100 + 3000×r×4100 = 2200⇒10000r + 12000r100 = 2200 ⇒2200r  = 2200×100⇒r = 2200×10022000.'. r  = 10% 
Bissoy MCQ

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