Math
posted by MathLover on .
The volume of a cylinder is 1256 meters. The height is 13 meters. Diameter is x. What is the diameter?

Volume of cylinder, 1256 m³
= πd²h/4
h=13, π=3.14159, solve for d. 
Idg how to to do x squared

d² is the same as d*d, or d multiplied by itself.
so
πd²h/4=1256
multiply by 4 on each side,
πd²h = 5024
divide by πh on each side:
d²=5024/(13π)=123
d=√(123)=11 metres.