Math, asked by king2455, 10 months ago

Find the total surface area of a cone, if its slant height is 21 m and diameter of its base is 24 m​

Answers

Answered by ANGEL123401
83

Hi mate here is the answer:-

Radius (r)= 24/2=12 m.

Slant height (l)= 21m.

TSA of a cone = πr(l+r)

 =  \frac{22}{7}  \times 12(21 + 12) \\  =  \frac{22}{7}  \times 12 \times 33 \\

= 3.14 × 396

= 1243.44 m^2

▫️:Hope it helps you:▫️

Answered by LinuxUser
2

Step-by-step explanation:

Given:

slant height as l : 21m

radius as r : 24/2 = 12m

Tsa of a cone = πr(l+r)

=>22/7*12(21+12)

=>22/7*12*33

=>22/7*396

=>8712/7

=>1244.57m²

Thus the total surface area of the cone is 1244.57m²

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