Q. 195.0( 5 Votes )

Answer :

Given, h = 24cm, r’ = 15cm and r’’ = 5cm

Let slant height be l

Slant height, l =

⇒ l = 26cm

Total surface area of the frustum = π(r’ + r’’)l+ π r’’^{2}

= π(15 + 5)(26) + π (5)^{2}

= 1711.3 cm^{2}

Cost of metal sheet used at the rate of Rs. 10 per 100=

= Rs171

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

PREVIOUSA solid cone of base radius 10 cm is cut into two parts through the mid-point of its height, by a plane parallel to its base. Find the ratio on the volumes of two parts of the cone.NEXTIn Fig. 16.74, from the top of a solid cone of height 12 cm and base radius 6 cm, a cone of height 4 cm is removed by a plane parallel to the base. Find the total surface area of the remaining solid.