Question

the simple interest on a certain sum for 8 months at 4% is Rs 129 less than the simple interest on the same sum for 15 months at 5% per annum. What is the sum.
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Answer 1

Answer:

Rs.3600

Description for Correct answer:

Let the sum = Rs.P,

$t1 = \frac{8}{12}$

$t2 = \frac{15}{12}$

According to the question,

$\frac{p \times 5 \times 15}{100 \times 12} - \frac{p \times 4 \times 81}{100 \times 12}$

$\frac{43p}{1200} = 129$

P= Rs. 3600

According to the question,

=Rs.3600

Answer 2

Answer:

₹3600

plz do ignore this little bit mess