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Find the lateral area of a cone with a radius of 7 ft. and a slant height of 13 ft.

0 votes

 Use 3.14 for π and round to the nearest tenth.

439.6 ft^2

324.5 ft^2

571.5 ft^2

285.7 ft^2

asked Mar 16, 2013 in ALGEBRA 2 by chrisgirl Apprentice

1 Answer

0 votes

The lateral area of a cone is pi x r x L

where r is the radius but L is the slant height andpi = 3.14 round to the nearest tenth

The radius r = 7ft

Slant height  L = 13ft

The lateral area of a cone = pi x r x L

Substitute r = 7ft and  L = 13ft in the lateral area of cone

The lateral area of a cone = pi x r x L

The lateral area of a cone =pi X 7 X 13

Substitute pi = 3.14 round to the nearest tenth

The lateral area of a cone = 3.14 X 91

There fore the lateral area of a cone = 285.74sqft.

 

 

 

answered Mar 16, 2013 by diane Scholar

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