Question

At what rate percent per annum of simple interest will :
(i) * 1000 amount to 1400 in 4 years ? (ii) A sum of money double in 5 years ?
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Answer 1

Answer:

10%p.a.

20%p.a.

Step-by-step explanation:

(i) Principal=1000

Time=4 years

Amount=1400

Simple interest = 1400-1000=400

Rate=SI*100/P*T

=400*100/1000*4

=10% p.a.

(ii) Let the principal be x.

Then, the amount is 2x.

Or, the Simple interest is = 2x-x=x

Time=5 years

Rate=SI*100/P*T

=x*100/x*5

=20%p.a.

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Answer 2

Answer:

first answer is 10

second answer is 20