Cylinder probability

For students of class 6-8 (age 12 to 14)
Raiyan Jamil
Posts: 138
Joined: Fri Mar 29, 2013 3:49 pm

Cylinder probability

If a cylinder has a height of 10 cm and radius of 5 cm, then if it is tossed, then what is the probability that, it's plane round surface will fall facing the ground
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Tasnood
Posts: 73
Joined: Tue Jan 06, 2015 1:46 pm

Re: Cylinder probability

Total surface area of the cylinder=$2\pi r(r+h)$=$2\pi \times 5(5+10)=500\pi$
Area of the plane round surface=$2\pi r^2$=$2\pi 5^2$=$50\pi$

Probability=$\frac{500\pi}{50\pi}$=$10$