A conical tent is 10 m high and the radius of its base is 24 m. Find cost of the canvas required to make the tent, if the cost of 1 m² canvas is Rs 70.

Area of convas to make the tent = πrl
= 22/7 × 24 × 26 m²
cost of 1 m² convas = Rs 70
Therefore, the cost of 22/7 × 24 × 26 m² canvas = Rs 70 × 22/7 × 24 × 26 = Rs 137280
Hence, the cost of canvas to make the tent is 137280.