Question

please say the answer and don't post irrelevant answers​

Answer 1

Answer:

Lateral surface area of cone= pie×r×L

Step-by-step explanation:

L²=r²+h²

L²=3.5²+12²

L²=12.25+144

L²=156.25

L=underrrot156.25

L= 12.5m

CSA of cone= 22÷7×3.5×12.5

=137.5m²

Area of canvas required=137.5m²