Question

a road roller of 45 cm and lengh 2 m has to be made(a road roller is a cylinder closed at ends) the cost of iron sheet is 75 paise per cm.What will be the cost of iron used in making the roller
${cm}^{2}$
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Answer 1

Area of playground =120*44 m^2

In cylinder,

• height =1.2 m
• diameter =0.7 m
• radius= 0.35

CSA=2πrh

=2*22/7*0.35*1.2

=2.64

no of revolution =area of playground/CSA

=120*44/2.64

=2000

Answer 2

Answer:

2000

Step-by-step explanation: