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RRB Group D Model Paper 6 with solutions
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© examsnet.com
Question : 84
Total: 99
If the diameter of a circle is doubled, then its area will become_______.
double
thrice
nine times
six times
Validate
Solution:
(3) If the diameter of circle is doubled, its radius will also get double. Initially the area of circle = π
r
2
Area of circle after doubling its diameter = π
(
2
r
)
2
= 4 π
r
2
∴ Area will become 4 times when the diameter is doubled.
© examsnet.com
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