Question

in a factory the production of motor bikes was 40,000 in a particular year which rose to 48,400 in two years find the rate of growth per annum if it was uniform during two years

Answer 1

total number of bikes in first year is 40000
in second year 48400
increases by 8400 bikes
percent is 21

Answer 2

Production of motor bike in a particular year =40,000
Let rate be r%
According to the question,
40000(1+r/100)^2=48400
(1+r/100)^2=48400/40000
(1+r/100)^2=121/100
(1+r/100)^2=(11/100)^2
1+r/100=11/10
r=10%
So the rate or growth =10% .ans