the radius of a hemispherical balloon increased from 6 and 12 cm is being pumped into it find the ratio of the surface area of the balloon in the two cases
Answers
Answered by
0
Answer:
Total surface area of a Hemisphere =2πr
2
+πr
2
=3πr
2
r=6,Surface area=3π(6)
2
=36
r=12,Surface area=3π(12)
2
=144
Ratio = 36:144
= 4
Answered by
1
Answer:
Total surface area of a Hemisphere =2πr
2
+πr
2
=3πr
2
r=6,Surface area=3π(6)
2
=36
r=12,Surface area=3π(12)
2
=144
Ratio = 36:144
=1:4
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