A cylindrical roller 2.5m in length 1.75m in radius when rolled on a road was found to cover the area of 5500m square how many did it make?
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Answered by
23
Hi ,
Let the length of the cylidrical
roller = ( h ) = 2.5m
Radius = r = 1.75m
Distance travelled when the one
turn off the roller = curved surface
area of the cylider
= 2πrh
According to the problem given,
Distance moved if ' n ' turns of the
roller = 5500m²
n × 2πrh = 5500
n = 5500/ ( 2πrh )
= 5500/ ( 2 × 22/7 × 1.75 × 2.5 )
After cancellation ,
n = 200
Therefore ,
The roller complete 200 turns .
I hope this helps you.
:)
Let the length of the cylidrical
roller = ( h ) = 2.5m
Radius = r = 1.75m
Distance travelled when the one
turn off the roller = curved surface
area of the cylider
= 2πrh
According to the problem given,
Distance moved if ' n ' turns of the
roller = 5500m²
n × 2πrh = 5500
n = 5500/ ( 2πrh )
= 5500/ ( 2 × 22/7 × 1.75 × 2.5 )
After cancellation ,
n = 200
Therefore ,
The roller complete 200 turns .
I hope this helps you.
:)
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3
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