A cylinder is full at 471 cm3 and has a radius of 5 cm. It currently contains 314 cm3 of water.

What will the difference in the height of the water be when the cylinder is full?
Use 3.14 to approximate pi.

Question

A cylinder is full at 471 cm3 and has a radius of 5 cm. It currently contains 314 cm3 of water.
 
What will the difference in the height of the water be when the cylinder is full?
Use 3.14 to approximate pi.

campbell_st · Answer

well use the formula for volume of a cylinder 

$$V = \pi r^2 h$$

making h the subject of the equation its

$$h = \frac{V}{\pi r^2}$$

you know r = 25  and V = 471   and also V = 314 

so substitute the information to find the height of the full container and the other height. 

Last task is to find the difference in heights

anonymous · Answer

r=5cm!!!!