Help! Cylinders A and B are congruent Cylinder A has a volume of 27 Tt cm^3 and a height of 3 cm. What is the diameter of Cylinder B?
V=A Tt r^2 h
A
3 cm
B
6 cm
9 cm
D
12 cm

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You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?