Total surface area `=(2 pi r h + 2 pi r^2)`sq.

Total surface area quad =2 pi Rh+2 pi rh+2 pi(R^(2)-r^(2))

Curved (lateral) surface area = (External surface areal) (Internal surface area)= 2 pi Rh+2 pi rh=2 pi h(R+r)sq. units.

A cylinder with radius r and height h is closed on the top and bottom.Which of the following expressions represents the total surface area of this cylinder? 2 pi r(r+h) (b) pi r(r+2h)pi r(2r+h)(d)2 pi r^(2)+h

The radius of a sphere is 3 cm. Its total surface area will be : (1) 18pi cm^(2) (ii) 36 pi cm^(2) (iii) 72pi cm^(2) (iv) 108 pi cm^(2)

If the diameter of the base of a closed right circular cylinder be equal to its height h, then its whole surface area is 2 pi h^(2) (b) (3)/(2)pi h^(2)(c)(4)/(3)pi h^(2)(d)pi h^(2)

A solid cylinder has the total surface area 231 sq. cm. If its curved surface area is 2/3 of the total surface area, then the volume of the cylinder is:

The total surface area of a cone of radius r/2 and length 2l , is a)2pir(l+r)b)pir(l+r/4) c)pir(l+r) d)2pirl

The total surface area of frustum shaped glass tumbler is (r_1 gt r_2) (a) pi r_1 l + pi r_2 l (b) pi l (r_1 + r_2) + pi (r_2)^2 (c) 1/3 pi h ( (r_1)^2 + (r_2)^2 + r_1r_2 ) (d) sqrt (h^2 + (r_1 - r_2)^2)

{:(,"Column A",,"Column B"),(18.,"If r and R be the radii of inner and outer circles, respectively, then area of a ring is _______.",(a),60),(19.,"The total surface area of a cube of edg" sqrt(10) "cm is ______." cm^(2).,(c ),pi (R^^(2)+r^(2))"sq. units"),(21.,"If the radius of the circule is 14 cm, then the area of the sector of angle." 45^(@) "is _______" cm^(2).,(d),pi(R^(2)-r^(2))"sq. units"),(,,(e ),sqrt(20)cm),(,,(f),77 cm^(2)):}