volume involving a person help

**vegito12** · August 11th 2010, 07:13 PM

A circular pool has a diameter of 3m and is filled to a depth of 70 cm. Mr Thorpe climbs into the pool and submerges for ten seconds while his son measures the new depth at 72 cm. Calculate Mr Thorpe’s volume.

**eumyang** · August 11th 2010, 07:27 PM

The volume of a right circular cylinder is
$V = \pi r^2 h$ .

To find the volume before Mr. Thorpe climbs into the pool, plug in r = 1.5 m and h = 0.7 m. I'll call this V1:
$V_1 = \pi (1.5)^2 (0.7) = \ldots$ .

To find the volume after Mr. Thorpe submerges in the pool, plug in r = 1.5 m and h = 0.72 m. I'll call this V2:
$V_2 = \pi (1.5)^2 (0.72) = \ldots$ .

To find Mr. Thorpe's volume, subtract the two volumes:
$V_2 - V_1 = \ldots$

Can you finish?

**vegito12** · August 11th 2010, 09:05 PM

Hi thanx for showing me working yes i can get ansewer now

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