Question

if the slant height and the base radius of Cone are 10 cm and 8cm find the total surface area​

Answer 1

Given :-

• Slant height of the cone = 10cm

• Base radius of the cone = 8cm

To Find :-

Total surface area of the cone = ?

Solution :-

Here,

A cone is given whose slant height and base radius is 10cm and 8cm

As we know that,

Total surface area of the cone

= πrl + πr²

Subsitute the required values,

= 22/7 * 8 * 10 + 22/7 * 8 * 8

= 1760 / 7 + 1408/7

= 1760 + 1408 / 7

= 3168 / 7

= 452.57cm²

Hence , The total surface area of the given cone is 452.57cm² $.$

Some related formulas :-

• CSA of cuboid = 2 ( l + b)h

• TSA of cuboid = 2 ( lb + bh + hl)

• CSA of cube = 4a²

• TSA of cube = 6a²

• CSA of cone = πrl

• CSA of cylinder = 2πrh

• TSA of cylinder = 2πrh + 2πr²