Question

- The radius of a cone is 10 cm and the total surface area
of a cone is 880 cm^2. Find the slant height.
of a cone is 10 cm and the total surface area​

Answer 1

Step-by-step explanation:

πr(r+l)= 880 cm^2

22/7 ×10 (10+l)=880

10+l =880×7/22×10

10+l=28

l= 28-10

l= 18cm

Answer 2

Slant height is l = 18.025 cm.

Given :

Radius , r = 10 cm.

Total surface area , $A=880\ cm^2.$

We have to find slant height l.

Also,   $T.S.A = \pi r(l+r)$

Putting value of area and radius in above equation.

We get ,

$880=3.14\times 10\times ( l+10)$

Solving above equation We get,

$l=18.025\ cm.$

Hence , this is the required solution.

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