pratiksha deposited 8000rs in a bank.after 2 years,she withdrew 3000rs and at the end of 4 years,she received an amount of 6800rs.Find the rate of simple interest.
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Answer
Let Rs. P be the sum
At 12% per annum the interest for 8 years
=
100
P×12×8
=
25
24P
qat 14% per annum the interest for 5 years
=
100
P×14×5
=
10
7P
ACQ,
⇒
25
24P
=3120+
10
7P
⇒(
25
24
−
10
7
)P=3120
⇒(
100
96−70
)P=3120
⇒(
100
26
)P=3120
⇒P=
26
3120×100
⇒P=12000Answer
Let Rs. P be the sum
At 12% per annum the interest for 8 years
=
100
P×12×8
=
25
24P
qat 14% per annum the interest for 5 years
=
100
P×14×5
=
10
7P
ACQ,
⇒
25
24P
=3120+
10
7P
⇒(
25
24
−
10
7
)P=3120
⇒(
100
96−70
)P=3120
⇒(
100
26
)P=3120
⇒P=
26
3120×100
⇒P=12000
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