Answers

2016-02-11T20:05:08+05:30
Surface area of small balloon : surface area of large ballon
4 \pi r^2 : 4 \pi R^2
therefore =r^2 : R^2
=7^2 : 14^2
=49 : 196
=1 : 4
1 5 1
2016-02-11T20:15:57+05:30
Surface area of small balloon=4πr^2
4*22/7*7^2=616cm^2
surface area of large balloon=4πr^2
4*22/7*14^2=2464cm^2

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