Along a path, 100 conical pillars are constructed Each pillar has base radius 14 cm and height 18 cm - Maths - Surface Areas and Volumes

Question

Along a path, 100 conical pillars are constructed Each pillar has
base radius 14 cm and height 18 cm Fin the total cost of painting
these pillars at the rate of Rs 120 per Sq m ​( Take pie =
22/7 )

Rajat Sethi · Accepted Answer

radius(r)= 14 cmHeight (h)= 18 cmSlant height,l=r2+h2=142+182=22
8 cmCSA of 1 conical pillar=πrl=227×14×22
8=1003
2 cm2CSA of 100 conical pillar=100×1003
2 cm2=10
032 m2Cost of painting 1 m2=Rs 120Cost of painting 10
032 m2=Rs 120×10 032=Rs 1203 84

Along a path, 100 conical pillars are constructed. Each pillar has base radius 14 cm and height 18 cm. Fin the total cost of painting these pillars at the rate of Rs.120 per Sq.m.​( Take pie = 22/7 )

Along a path, 100 conical pillars are constructed. Each pillar has base radius 14 cm and height 18 cm. Fin the total cost of painting these pillars at the rate of Rs.120 per Sq.m.( Take pie = 22/7 )