NCERT Exercise 11.1 Q8 - Surface Areas and Volumes
Question: A bus stop is barricaded using 50 hollow cones of recycled cardboard. Each cone has base diameter 40 cm and height 1 m. If the outer side is painted at ₹12 per m², find the cost. Use π = 3.14 and √1.04 = 1.02.
Answer: Cost of painting all cones ≈ ₹384.34.
Full step-by-step NCERT solution with diagrams on Something by Zero.