a right triangle with sides 3cm 4cm and 5cm is rotated about the side 4 cm find the volume and csa of the solid formed pls help me quick
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Step-by-step explanation:
triangle is rotated about 4 cm side. hence, height of the cone formed is 4 cm. radius of base is 3 cm, slant height l is 5 cm
volume = (1/3)πr^2h
= (1/3)*π*3^2*4
volume = 12π cubic cm
curved surface area of cone = πrl
= π*3*5
= 15π sq. cm
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