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Standard VII
Mathematics
Percentages
Calculate tim...
Question
Calculate time when SI on
2000
Rupees at
10
% pa be the same as that on
R
s
.3000
at
12
% pa in 4 years
A
7
years
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B
7.2
years
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C
7.4
years
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D
7.6
years
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Solution
The correct option is
B
7.2
years
Let time is
T
years
2000
×
10
×
T
100
=
3000
×
12
×
4
100
T
=
12
×
4
×
3
2
×
10
=
7.2
years
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0
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Q.
R
s
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Find SI on sum of
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Q.
Compute the amount and the compound interest in each of the following by using the formulae when:
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7
1
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(vii) Principal = Rs 160000, Rate = 10 paise per rupee per annum compounded half-yearly, Time = 2 years.
Q.
Rs. 5200 was partly invested in Scheme A at 10% pa CI for 2 years and partly invested in Scheme B at 10% pa SI for 4 years. Both the schemes earn equal interests. How much was invested in Scheme A?
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