“A solid consists of a right circular cylinder surmounted by a cone of the same diameter. If the height of the cone is 'h' and the volume of the solid is 3 times the volume of the cone , then find the height of the cylinder.”

Answer 1

If the cylinder's height is H, then we have

1/3 πr^2h + πr^2H = 3 * 1/3 πr^2h
πr^2H = 2/3 πr^2h
H = 2/3 h

Answer 2

A bicycle wheel of radius 35cm is making 25 revolutions in 10secs. At what speed in km/hr is the cyclle moving.

Answer 3

2π*35 cm/rev * 25rev/10s * 1km/100000cm * 3600s/hr = 19.79 km/hr

Answer 4

Thanx man!!😜

Answer 5

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