Question

In how many months will rs.4000 to rs.5000 at 10% PA simple interest

Answer 1

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7th

Maths

Comparing Quantities

Simple Interest

Rs.4,000 amount to Rs.5,000...

MATHS

Rs.4,000 amount to Rs.5,000 in 8 years; in what time will Rs.2,100 amount to Rs.2,800 at the same rate ?

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ANSWER

Simple Interest I=

100

PNR

Given,

AmountA=Rs5000

P=Rs4000

I=A−P=5000−4000=Rs1000

N=8years

So, 1000=

100

4000×8×R

=>R=3.125 %

Now, we need to find N when A=Rs2800;P=2100

=>I=2800−2100=Rs700

So, Rs700=

100

2100×N×3.125

=>N=10years 8months

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