1. Volume of a cone of height ‘h’ and base radius ‘r’ is
(A) 1/2 π r h²
(B) 1 π r h 3
(C) 2 π r h
(D) 1/2 π r² h
2. Volume of cone of radius of base 3cm and height 12cm is
(A) 36π cu. cm
(B) 108π cu. cm
(C) 12π cu. cm
(D) 54 cu. cm
3. The diameter of base of cone is 6cm and the height is 4 cm then slant height ‘l’ is
(A) 7 cm
(B) 52 cm
(C) 5 cm
(D) 5 cm
4. The curved surface of a right circular cone of radius 3cm and slant height 6cm is
(A) 54π
(B) 18π
(C) 9π
(D) 6 cm
5. The line joining the vertex of a cone to the boundary line of the base is called
(A) height
(B) perimeter
(C) length
(D) slant height
6. Curved surface of a right cone of height ‘h’ and base radius ‘r’ is
(A) 2 π (h + r)²
(B) π r³
(C) π (h + r)/3
(D) 2 π r (h + r)
7. Volume of frustum of a cone with R and r as its end radii is
(A) 1/3 π h (R + r + π r)
(B) 1/3 π h (R² + r² + Rr)
(C) 2 π h (R + r + Rr)
(D) π h (R + r + Rr)/3