Question

Plant A is 25 ft tall and plant B is 20 ft tall. Plant A grows 2 ft per week and Plant B grows 2 15ft per week. In how many weeks will the heights of the two plants become equal?

Answer 1

Answer :

Given
Height of plant A = 25 ft
Height of plant B = 20 ft
And
Rate of growth of plant A = 2 ft / week
Rate of growth of Plant B = 2.15 ft / week

Let these plants at same height after x week , So
Height of plant A after x week
= 25 + 2 x
And
Height of plant B after x week
= 20 + 2.15x
So, for find out how many week it take to make height same

25 + 2x = 20 + 2.15x

0.15x = 5

x = 33.33

So,
after 33.33 week both plant at same height ( Ans )