Question

Gangamma was selling a kerosene funnel in her shop which is made aluminium sheet which is a combination of frustum and cylinder

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Gangamma was selling a kerosene funnel in her shop which is made aluminium sheet which is a combination of frustum and cylinder.

Area of aluminium sheet is 782 4/7 cm^2

• Area of aluminium sheet is given by,
• CSA of cylinder + CSA of frustum of cone
• = 2πrh + π (r1+r2)l
• = 2πrh + π (r1+r2)√[h^2 + (r1-r2)^2]
• = 2π × 8/2 × 10 + π × (18/2 + 8/2) × √[(22-10)^2 + (18/2 - 8/2)^2]
• = 80 π + π (26/2) √ (144 + 25)
• = 80 π + π (13) √ (169)
• = 80 π + π (13) × 13
• = 80 π + 169 π
• = 249 π
• = 249 × 22/7
• = 782 4/7 cm^2