Fifty hollow traffic cones, each with base diameter 40 cm and height 1 m, are painted on the outside at ₹12 per m². Using π = 3.14 and √1.04 ≈ 1.02, what is the cost?

Question

Accepted Answer

₹384.34. r = 0.2 m, l = √(0.04 + 1) = √1.04 ≈ 1.02 m. One cone: 3.14 × 0.2 × 1.02 = 0.64056 m². Fifty cones: 32.028 m². Cost = 32.028 × 12 ≈ ₹384.34. (₹376.80 uses h for l; ₹768.67 uses the diameter.)

Fifty hollow traffic cones, each with base diameter 40 cm and height 1 $m$ , are painted on the outside at ₹12 per $m^{2}$ . Using π = 3.14 and √1.04 ≈ 1.02, what is the cost?

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More Class 9 Surface Area of a Cone practice

Fifty hollow traffic cones, each with base diameter 40 cm and height 1 m, are painted on the outside at ₹12 per m2. Using π = 3.14 and √1.04 ≈ 1.02, what is the cost?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Surface Area of a Cone practice

Fifty hollow traffic cones, each with base diameter 40 cm and height 1 $m$ , are painted on the outside at ₹12 per $m^{2}$ . Using π = 3.14 and √1.04 ≈ 1.02, what is the cost?