Question

If the diameter or abroad
volley is abcm
and length is
loocum it takes 300 complete
revolutions to roll once over
the
playground to level. Find
area of the playground
in m²?

Answer 1

Step-by-step explanation:

The roller in shape of cylinder

it's length consider as hieght

daimeter is 70 and radius is 35cm

so, it's curved surface area is

=2πrh

=2×22×35×100/7

=22000 cm²

so in m² 

=22000/100 m²

=220 m²

if it roll full one time it covers 220 m² area of playground

so,

1:?::220:4400

=4400/220

=20

so it will take 20 revolutions to level the playground

Answer 2

Answer:

20 revolution

Step-by-step explanation:

The roller in shape of cylinder

it's length consider as hieght

daimeter is 70 and radius is 35cm

so, it's curved surface area is

=2πrh

=2×22×35×100/7

=22000 cm²

so in m²

=22000/100 m²

=220 m²

if it roll full one time it covers 220 m² area of playground

so,

1:?::220:4400

=4400/220

=20

so it will take 20 revolutions to level the playground

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