Answers

2016-04-05T12:56:02+05:30
Total surface area of a balloon = 4πr²
total surface area of 72 balloon =  44352
72×4πr² = 44352
r = 7
volume of ethane gas used = 72 ×4/3πr³
volume of gas = 72×4×22×7×7/3 = 103488 cm³
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