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Question

A certain sum amounts to Rs. 3825 in 4 years and to Rs. 4050 in 6 years. Find the rate percent and the sum.

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Solution

In 6 years sum amounts to = Rs. 4050
In 4 years sum amounts to =Rs. 3825
Interest of 2 years=Rs. 4050-Rs. 3825
=Rs. 225
Interest of 4 years= Rs. 2252×4
=Rs.450 Now P= A-I
=Rs. 3825 - Rs.450
=Rs. 3375
I= Rs. 450
T=4 years
R=100×IP×T
=100×4503375×4
=4500013500% =450135 %
=103% = 313 %
P= Rs. 3375


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