find out the area of metal sheet needed to make a closed cylinder of radius 4.2cm and height 6cm also find out volume of the cylinder
Answers
Answer:
The answer is = 50•4
Step-by-step explanation:
the area of the metal sheet =
4•2 cm ×2= 8•4 cm
The height of the cylinder= 6 cm
The volume of the cylinder= 8•4×6
= 50•4
Given : a closed cylinder of radius 4.2cm and height 6cm
To find : the area of metal sheet needed to make a closed cylinder
volume of the cylinder
Solution:
r = 4.2 cm
h = 6 cm
area of metal sheet needed to make a closed cylinder = Total Surface area of cylinder
Total Surface area of cylinder = 2πr² + 2πrh
= 2πr(r + h)
= 2 ( 22/7) * 4.2 ( 4.2 + 6)
= 26.4 ( 10.2)
= 269.28 cm²
area of metal sheet needed = 269.28 cm²
Volume of cylinder = πr²h
= (22/7) (4.2)² * 6
= 332.64 cm³
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