A right circular cylinder and a sphere are of equal volumes and their radii are also equal. If h is the height of the cylinder and d, the diameter of the sphere, then :
A. $$h = d$$
B. $$2h = d$$
C. $$\frac{h}{3} = \frac{d}{2}$$
D. $$\frac{h}{2} = \frac{d}{3}$$
Answer: Option D
Solution(By Examveda Team)
Let the radius of the sphere and that of the right circular cylinder be rThen,
Volume of the cylinder $$ = \pi {r^2}h$$
Volume of the sphere $$ = \frac{4}{3}\pi {r^3}$$
$$\eqalign{ & \therefore \pi {r^2}h = \frac{4}{3}\pi {r^3} \cr & \Rightarrow 3h = 4r \cr & \Rightarrow 3h = 2d \cr & \Rightarrow \frac{h}{2} = \frac{d}{3} \cr} $$
Related Questions on Volume and Surface Area
A. 12$$\pi$$ cm3
B. 15$$\pi$$ cm3
C. 16$$\pi$$ cm3
D. 20$$\pi$$ cm3
In a shower, 5 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is:
A. 75 cu. m
B. 750 cu. m
C. 7500 cu. m
D. 75000 cu. m
A. 84 meters
B. 90 meters
C. 168 meters
D. 336 meters
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