A) \[40\,\pi \]
B) \[60\,\pi \]
C) \[80\,\pi \]
D) \[100\,\pi \]
Correct Answer: C
Solution :
Area of iron sheet required = Curved surface area of tunnel \[=2\pi rh=(2\times \pi \times 1\times 40)\,{{\text{m}}^{2}}=80\pi \,\,{{\text{m}}^{2}}\]You need to login to perform this action.
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