Question

If Dia of cylinder is 21 cm and ( h) is 4 cm Then find TSA , CSA and Vol of cylinder. ​

Answer 1

Step-by-step explanation:

r = 21/2 cm

Volume = πr^2 h

V = 22/7 × (21/2)^2 × 4

V = 1386 cm^3

Curved Surface Area = 2πrh

CSA = 2 × 22/7 × 21/2 × 4

CSA = 264 cm^2

Total Surface Area of closed cylinder = 2πr(h+r)

TSA = 2 × 22/7 × 21/2 × (21/2 + 4)

TSA = 957 cm^2

Answer 2

Step-by-step explanation:

Given , Diametre of cylinder = 21 cm , therefore radius ,r = 21/2 cm

Height = 4 cm

(i) . TSA - 2πr^2 + 2πrh

= 2×22/7 × 21/2 ×21/2 ×4

= 2772 cm^2 { ANSWER}

(ii) . CSA - 2πrh

= 2×22/7 × 21/2 ×4

= 264 cm^2 { ANSWER }

(iii) . Volume - πr^2 h

= 22/7 × 21/2 × 21/2 ×4

= 1386 cm^3

REGARDS ,

DR . ISHANT SRIVASTAVA

(CHIEF MEDICAL OFFICER )

BHILAI

DURG