A road roller of 3.2 m long and 1.4 m in radius when rolled on a road was found to cover 19712 sq.M. How many revolutions does it make
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Step-by-step explanation:
Given, length of a cylindrical roller , h= 2.5
Radius of a cylindrical roller = 5500m2
∴ Area rolled to cover in one revolution = Curved surface area of a cylindrical roller
=2πrh=2×227×1.75×2.5
=44×4.3757=192.57=27.5m2
∴ Number of revolutins rolled by a cylindrical
=Total area rolled by a cylindrica rollerArea rolled to cover by a cylindrical roller in one revolution=550027.5=200
Hence, the number of revolutions rolled by a cylindrical roller on a road is 200.
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