Question

the simple intrest on a certain sum for 8 months at 4% is rs129 less than the simple intrest on the same sum for 15 month at 5% per annum .what is the sum?​

Answer 1

sorry I'm nothing understand

Answer 2

Answer:

3600

Let the sum = Rs.P,

T1=812812years

T2=15121512years

According to the question,

P×5×15100×12−P×4×8100×12P×5×15100×12−P×4×8100×12=129

=43P120043P1200=129

P= Rs. 3600