1.

A right circular of volume 1386 cm^(3) is cut from a right circular cylinder of radius 4 cm and height 49 cm, such that a hollow cylinder of uniform thickness, with a height of 49 cm and an outer raidus of 4 cm is left behind. Find the thickness of the hollow cylinder left behind.

Answer»

0.5 cm
2 cm
1.5 cm
1 cm

Solution :Find the RADIUS of the cylinder which is CUT. (i.e., `PI r^(2)h` = 1386).


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