If the radius of a sphere is doubled, how many times does its volume becomes ?
A. 2 times
B. 4 times
C. 6 times
D. 8 times
Answer: Option D
Solution(By Examveda Team)
Let the original radius be rThen, original volume = $$\frac{4}{3}\pi {r^3}$$
New area = 2r
∴ New volume :
$$\eqalign{ & = \frac{4}{3}\pi {\left( {2r} \right)^3} \cr & = 8 \times \frac{4}{3}\pi {r^3} \cr & = 8 \times {\text{Original volume}} \cr} $$
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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