How much cloth material will be required to cover 2 big domes each of radius
2.5 metres? (Takej = 2217)
a) 75m2
b) 78.57m2
c) 87.47m2
d) 25.8m2
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R.E.F image
C.S.A. of cone = area of cloth
⇒l2=242+72⇒l=25cm
πrl=b×w
⇒π×7×25=2.5×b
⇒b≃220m

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