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27-02-2020
Mathematics

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A cylindrical roller with diameter 77 cm and height 1 m is used to level a rectangular park with dimensions22 × 11 . Find the number of revolutions required to level the park.

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thaovtp1407 thaovtp1407

28-02-2020

Answer:

100

Step-by-step explanation:

We have the circumference of cyclinder

=πD

=length covered by one single revolution.

So,

Length=3.14*77 =242 cm =2.42 m

Total area =22*11=242 m^2

=> Total number of revolutions=242/2.42=100

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