Math, asked by sanya280821, 4 months ago

Q1.The radius of a hemispherical balloon increases from 3.5cm to 10.5 cm as air being pumped into it .Find the ratios of the surface areas of the balloon in the two cases.

Answers

Answered by indianarmy29

1

Answer:

31:673 will be answer

Step-by-step explanation:

use formula 3×22÷7×r² for both and then divide them

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