Question

find the surface area of cone r=3.5,l=10cm​

Answer 1

Step-by-step explanation:

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Answer 2

$r = 3.5 \: cm \: \: l = 10 \: cm \\ therefore \\ surface \: area \: of \: cone = \pi \: rl \\ = 22 \div 7 \times 3.5 \times 10 \\ = 22 \div 7 \times 35 \div 10 \times 10 \\ = 22 \div 7 \times 35 \\ = 22 \times 5 \\ 110cm {}^{2}$