the diameter of a garden roller is 1.4 m and it is 2m long. how much area will it cover in 50 revolutions ?
Answers
Answered by
17
Hey there!!
Garden roller is in the shape of a cylinder
The area of the garden roller = surface area of the cylinder
⇒ 2πrh
radius = 0.7 m ( Radius = Diameter ÷ 2 )
( 2 ) ( 22 ÷ 7 ) ( 7 ÷ 10 ) ( 2 )
( 2 ) ( 22 ) ( 1 ÷ 10 ) ( 2 )
( 2 ) ( 22 ) ( 1 ÷ 5 )
( 44 ÷ 5 )
8.8 m²
This is the area covered for one revolution
For 50 revolutions =
( 8.8 ) ( 50 )
The required answer is 440 m²
_______
Answered by
2
The diameter of a garden roller is 1.4 m and it is 2m long. How much area will it cover in 50 revolutions.
✏ Area it will cover in 5 revolutions = ❓
✏ Radius, r =
✏ r =
✏ r = 0.7 m
= 2Πrh
= 2 × × 0.7 × 2
= 8.8 m sq.
= 8.8 m sq.
= 8.8 × 50
= 440 m sq.
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