12. If radius and height both are doubled, find the ratio between the volumes of the new with the
original cylinder
Answers
Answered by
4
Answer:
If the radius r doubles to 2r then their squares are r2 and 4r2 so the volume ratio will be 1:4 .
Since it asks for ratio of new to old, better make that 4:1 .
Answered by
8
Answer:
the answer should be 4:1
Step-by-step explanation:
volume of cylinder =2πrh
if r and h are doubled
New volume =2π2r2h = 8πrh
ratio of volume of new : original
= 2πrh : 8πrh
= 2 : 8
= 1 : 4
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