Question

solve it long method

Answer 1

Let the rate of interest be x so the equation shall be

6000*x%*8-600*x%*1 =8400

420x=8400

X=20

Here 8 is nunber of years, as in the question it is mentioned time increases by 7,so assume original time be 1 year and revised time be 8 year.

Answer 2

Answer:

Here,

P = 6000

A = 8400

so, S.I = A - P

= 8400 - 6000

= 2400

We know that,

S.I = P×R×T/100

2400=6000×R×7/100

R = 2400×100/6000×7

=40/7

=5.7

Step-by-step explanation: