A) \[59\text{ }\pi \,c{{m}^{2}}\]
B) \[5\pi c{{m}^{2}}\]
C) \[100\pi c{{m}^{2}}\]
D) \[120\pi c{{m}^{2}}\]
Correct Answer: C
Solution :
(c): ![]() | Let ABC be a right triangle with AB=12cm, BC=5 cm and AC= 13cm When this triangle is revolved about AB, it forms a right circular cone of radius =BC=5cm and height AB= 12 cm. \[\therefore {{V}_{1}}\]= Volume of the solid formed= Volume of the cone of radius 5 cm and height 12 cm \[=\frac{1}{3}\times \pi \times 5\times 5\times 12c{{m}^{3}}=100\pi c{{m}^{3}}\] |
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