Question

At what rate % will the interest on a principal become 225 of itself in 4 yrs.?​

Answer 1

Answer:

Let the principal = P

A/C to question,

the simple interest on assume of money will be 225 after 3 years

so, in 1 year simple interest will be 225/3 = 75rs.

now, again question said " in the next 5 years principal becomes 3 times "

e.g., S.I of 5 years + P = 3P

S.I of 5 years = 2P

S.I of 1 year × 5 = 2P

75 × 5 = 2P

2P = 375 => P = 375/2 rs.

now, total interest at the end of the 8 years = S.I of 1 years × 8 + P

= 75 × 8 + 375/2

= 600 + 187.5

=787.5 rs.