RRB Junior Engineer Stage 1 Model Papers 2

Question : 12 of 99

Marks: +1, -0

An amount was lent for two years at the rate of 20% per annum compounding annually. Had the compounding been done half yearly, the interest would have increased by 241. What was the amount (in ₹) lent?

10000
12000
20000
24000

Validate

Solution:

Let sum ₹ = x
C.I. when compounded half yearly

=[x(1+20/200)^4-x]={4641x}/10000

C.I. when compound annually

=[x(1+20/100)^2-x]={11x}/25

Now,

{4641x}/10000-{11x}/25=241

∴x=10000

∴ sum = ₹ 10000

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