Question

The diameter of garden roller is 1.4 m and it is 2 m long. How
much area will it cover in 5 revolutions ​

Answer 1

Answer:

44 sq m

Step-by-step explanation:

the roller is in the form of cylinder

length = l = 2m

diameter of cylinder is = 1.4 m

radius = r = 1.4/2 = 0.7 m

to find the distance covered we need to find its surface area

the distance covered in one revolution = 2πrl

distance covered in 5 revolutions = 5× 2πrl

$= 5 \times 2 \times \frac{22}{7} \times 0.7 \times 2 \\ = 5 \times 2 \times \frac{22}{10} \times 2 \\ = 5 \times \frac{22}{5} \times 2 \\ = 22 \times 2 \\ = 44$

the area covered in 5 revolutions is 44 sq m.

hope you get your answer

Answer 2

Answer:

Step-by-step explanation:

given diameter =1.4m then r=0.7m

height =2m

area coverd for 1 rotation is 2πrh

by substituting the values we get

2*22/7*2*7/10

88/10

8.8 m^2

for 5 revolutions it takes

8.8*5

44 m ^2