Question

simple interest on a certain sum for 9 by 2 years at 10% is rupees 975 more than the simple interest on the same sum for 5 by 2 years at 8% find the sum and what will be the amount in 4 years at 7% simple interest




i need the correct answer
its urgent. WITH EXPLANATION ​

Answer 1

Answer:

Step-by-step explanation:

First Condition:

Time=9/2 years

Principal=x

Rate=10%

Therefore, Interest=(x*10*9)/100*2

=90x/200

=9/20 x

Second Condition:

Time=5/2 years

Rate=8%

Principal=x

Therefore, Interest=(x*5*8)/100*2

=4/20 x

Given: Difference between 1st condition and second condition is 975

Therefore, 9/20 x - 4/20 x = 975

On solving, we have:  x=3900

Therefore, Principal=Rs.3900

2nd Question:

P=3900

R=8%

T=4yrs

Interest=3900*8*4/100

=1248

Amount=3900+1248

Ans=Rs.5148