Question

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​

Answer 1

Answer:

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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 



Answer 2

Answer:

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