The length of a roller is 40 cm and its diameter is 21 cm It takes 300 complete revolutions to move once over to level a floor of a room find the area of the room in metres square
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length of roller "h"=40cm=4/10m
Diameter " " d =21cm= 21/100m
therefore Radius r=21/200m
in one revolution
Area level by roller = Curve S-A of roller
= 2πrh
put values of π r and h
you will get area level in 1 revolution and multiple this by300 you will get total area of room
Diameter " " d =21cm= 21/100m
therefore Radius r=21/200m
in one revolution
Area level by roller = Curve S-A of roller
= 2πrh
put values of π r and h
you will get area level in 1 revolution and multiple this by300 you will get total area of room
Answered by
8
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