7. A road roller takes 750 revolutions to move once to level a road. Find the area
of the road if the diameter of the road roller is 84 cm and its length is 1m.
Answers
Answered by
1
Answer:
1980 m²
Step-by-step explanation:
Area of road =750× area covered in 1 revoluation
=750× lateral surface area of cylinder
=750×2πrh
Given, d=84cm⇒r=42cm→
100
42
m
h=1m
=750×2×
7
22
×
100
42
×1
=
100
1500×132
=1980m
2
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