Question

The diameter of the base of a right circular cylinder is 28cm and its height is 21cm .Find its (1) curved surface area (2) total surface area and volume

Answer 1

$\huge\mathfrak\green{Ello}$

$\red{\bold{\underline{\underline{Given:-}}}}$

Diameter = 28cm

so, radius = 14 cm

Height = 21 cm

$\pink{\bold{\underline{\underline{To\: Find:-}}}}$

1. Curved surface area

2. Total Surface area

3. Volume

$\purple{\bold{\underline{\underline{Formula\: used:-}}}}$

1. CSA=πdh
2. TSA= CSA+2πr²
3. Volume= πr²h

$\green{\bold{\underline{\underline{Curved\: Surface\:Area:-}}}}$

CSA=πdh

so, CSA = π.28.21

OR, CSA = π28.21 cm²

so, CSA = 1848 cm²

$\orange{\bold{\underline{\underline{Total\: Surface\:Area:-}}}}$

=CSA+2πr²

=1848+2π14²

TSA=1848+616

so, TSA=2464 cm²

$\blue{\bold{\underline{\underline{Volume:-}}}}$

=πr²h

=π14².21

= 12936 cm³

$\huge\mathfrak\pink{Thanks}$

Answer 2

Given:−

Diameter = 28cm

so, radius = 14 cm

Height = 21 cm

ToFind:−

1. Curved surface area

2. Total Surface area

3. Volume

Formulaused:−

CSA=πdh

TSA= CSA+2πr²

Volume= πr²h

CurvedSurfaceArea:−

CSA=πdh

so, CSA = π.28.21

OR, CSA = π28.21 cm²

so, CSA = 1848 cm²

TotalSurfaceArea:−

=CSA+2πr²

=1848+2π14²

TSA=1848+616

so, TSA=2464 cm²

Volume:−

=πr²h

=π14².21

= 12936 cm³

Thanks!!