Answers

2016-02-04T20:59:32+05:30
H=1m=100cm
d=140cm
r=140/2=70cm
surface area=2*22/7*70(100+70)=74800cm2
square metres=74800/100*100=7.48m2
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i think there is a mistake in your answer
it should be 22*70/7(140 n not 
22*70/22(140+100)
no it is correct
2016-02-04T21:00:48+05:30
H=1m
r=0.7m
total suface area=>2πr²+πrh
=>πr(2r+h)
=>22*0.7/7(2*0.7+1)
=>22/10(1.4+1)
=>22*24/100
=>528/100
=5.28m² of metal sheets are required for making the tank

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