Question

The diameter of a garden roller is 5.6 and it is 1m long.how much will it cover in 20 revolution

Answer 1

Answer:

Step-by-step explanation:

r =5.6/2 = 2.8

CSA of cylinder= 2πrh

=2×22/7×2.8×1

=17.6m sq

AREA COVERED IN 20 REVOLUTION=CSA×20

=17.6×20

=352 m sq

Answer 2

Answer:

35200cm^2

Step-by-step explanation:

diameter= 5.6cm

so, radius = 2.8cm

height = 1m=100cm

CSA =

$2\pi \times r \times h$

CSA =

$2 \times22 \div 7 \times 2.8 \times 100$

=

$44 \div 7 \times 280$

=

$1760 cm ^{2}$

now,

area covered in 20 revolution =

$csa \times 20$

$1760 \times 20$

$35200 cm^{2}$