Answer:
10 years
Step-by-step explanation:
let they become of same height after t years
3ft=36 inches
hence
height of A
Ha=36+21t
8ft=96 inches
height of B
Hb = 96+15t
as Ha =Hb
36+21t =96+15t
21t-15t =96-36
6t=60
t=60/6
t= 10 years
Step-by-step explanation:
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The correct answer is
<span>C) The volume is the same in both cylinders.
In fact, the volume of a cylinder is:
</span>

<span>where r is the radius of the base and h the height of the cylinder. This formula is valid for both right and non-right cylinders, and since the two cylinders in the figure have same radius and height, their volume is equal.</span>