Question

A conical tent is 15m high and the radius of its base is 20m. The cost of the Canvas required to make the tent at the rate of ₹ 7 per m² is: ????
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Answer 1

Given :-

• A conical tent is 15m high and the radius of its base is 20m.

To find :-

• Total cost required for making canvas

Solution :-

• Height of canvas = 15m

• Radius of base = 20m

As we know that

→ Slant height = √(radius)² + (height)²

→ I = √(r)² + (h)²

→ I = √(20)² + (15)²

→ l = √400 + 225

→ l = √625

→ l = 25m

Now,

• Curved surface area of canvas = corved surface area cone

→ πrl

→ 22/7 × 20 × 25

→ 440/7 × 25

→ 11000/7 cm²

• The cost of the Canvas required to make the tent at the rate of ₹ 7 per m²

Total cost

→ 11000/7 × 7

→ Rs.11000

Hence,

• Total cost required for making canvas is Rs.11000

Answer 2

As we know that

→ Slant height = √(radius)² + (height)²

→ I = √(r)² + (h)²

→ I = √(20)² + (15)²

→ l = √400 + 225

→ l = √625

→ l = 25m

Now,

Curved surface area of canvas = corved surface area cone

→ πrl

→ 22/7 × 20 × 25

→ 440/7 × 25

→ 11000/7 cm²

The cost of the Canvas required to make the tent at the rate of ₹ 7 per m²

Total cost

→ 11000/7 × 7

→ Rs.11000

Hence, Total cost required for making canvas is Rs11000.