rocket is in the form of a circular cylinder closed at the lower end with a cone of the same radius attached to the top. The cylinder is of radius 2.5m and height 21mand the cone has the slant height 8m. Calculate the total surface area
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Answer:
Step-by-step explanation:
Total surface area = Area of base of cylinder+ Area of curved surface of cylinder+Area of curved surface of cone
A=π×r 2 +2πrh+πrl
h=height of cylindrical part
l=slant height of conical part
r=radius of cylinder=radius of cone
A=π×2.5 2 +2π×2.5×21+π×2.5×8
A=412.334m
Volume of tent=πr 2 h+ 3 1 πr 2 h
V=π×2.5 2 ×21+ 3 1 π×2.5 2 ×7.6
V=462.076m
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