The curved surface area of a cone is displaystyle 320- m - 2 - whose radius is 7 m- Find the surface area of a cone -Assume displaystyle pi -frac - 22 - 7 - -displaystyle 474- m - 2 -displaystyle 424- m - 2 -displaystyle 404- m - 2 -displaystyle 454 m

Question

The curved surface area of a cone is displaystyle 320- m - 2 - whose radius is 7 m- Find the surface area of a cone -Assume displaystyle pi -frac - 22 - 7 - -displaystyle 474- m - 2 -displaystyle 424- m - 2 -displaystyle 404-  m - 2 -displaystyle 454 m

Toppr Admin · Accepted Answer

Given- surface area of cone -320 m2 and radius 7 m-x2234- Total surface area of a cone - -x3C0-rs-x3C0-r2-320-227-xD7-7-xD7-7-320-154-474m2-Hence- option A is correct-

The curved surface area of a cone is $320 m^{2}$ whose radius is $7$ m. Find the surface area of a cone (Assume $π = \frac{22}{7}$ ).
$474 m^{2}$
$424 m^{2}$
$404 m^{2}$
$454 m$

Given, surface area of cone $= 320$ $m^{2}$ and radius $7$ m.

$∴$ Total surface area of a cone $=$ $π r s + π r^{2}$
$= 320 + (\frac{22}{7}) \times 7 \times 7$
$= 320 + 154$
$= 474 m^{2}$ .

Hence, option $A$ is correct.

The curved surface area of a cone is 320 m2 whose radius is 7 m. Find the surface area of a cone (Assume π=227).474 m2424 m2404 m2454 m

Given, surface area of cone =320 m2 and radius 7 m.∴ Total surface area of a cone = πrs+πr2=320+(227)×7×7=320+154=474m2.Hence, option A is correct.

The curved surface area of a cone is $320 m^{2}$ whose radius is $7$ m. Find the surface area of a cone (Assume $π = \frac{22}{7}$ ).
$474 m^{2}$
$424 m^{2}$
$404 m^{2}$
$454 m$

Given, surface area of cone $= 320$ $m^{2}$ and radius $7$ m.

$∴$ Total surface area of a cone $=$ $π r s + π r^{2}$
$= 320 + (\frac{22}{7}) \times 7 \times 7$
$= 320 + 154$
$= 474 m^{2}$ .

Hence, option $A$ is correct.