Answers

2015-12-08T19:26:21+05:30
You need to find the LSA of the cone which gives you the answer:
πrl
l²=r²+h²
=7²+27²
=49+729
=778
l=28(approx)
πrl
=3.14×7×28
=615.4

Area of sheet required to make 10 such caps
=615.4×10
=6154(approximately)
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sorry, just forgot to write units......................it's 6154cm2
the value aren't exact but the method is undoubtedly right
2015-12-08T19:29:47+05:30
L²=r²+h²
l=√7²+27²
l=√49+729
l=√778
C.S.A=πrl
C.S.A=(22/7)×7×√778
C.S.A=613.63
AREA OF SHEET REQUIRED TO MAKE 10 CAPS=
613.63×10
 AREA OF SHEET REQUIRED TO MAKE 10 CAPS=6136.3cm² (its accurate)
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