Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> A conical tent of base radius 7 cm and slant height 10 cm is to be made from a cloth. If the cost of the cloth is ₹50/${cm}^2$, find the total cost of the cloth required to make the tent. (Take π = $\frac{22}{7}$)

• A. ₹18,700
• B. ₹220
• C. ₹11,000

Answer 1

The correct option is C ₹11,000

Given,

Base radius of the cone, r = 7 cm

Slant height of the cone, l = 10 cm

Curved surface area of the cone = πrl

= $\frac{22}{7}$ × 7 × 10

= 220 $c{m}^2$

Cost of cloth is ₹50 per $c{m}^2$.

∴ Cost of cloth for the tent
= 220 × 50

= ₹11,000