Question

Find the area covered by a road roller in 250 revolutions, if its radius is 42 cm and length is 80 cm.​

Answer 1

Answer:

area in one revolution = 2πrh

2×22/7×42×80

21120cm^2

area covered in 1 revolution = 21120cm^2

area covered in 250 revolution = 5280000cm^2

Step-by-step explanation:

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Answer 2

$\huge\sf\red{Question}$

Find the area covered by a road roller in 250 revolutions, if its radius is 42 cm and length is 80 cm.

$\huge\sf\red{Answer}$

$\large\sf\green{Given:-}$

Radius of road roller =42cm

Length of road roller= 80cm

$\large\sf\green{To\:Find:-}$

Area covered by a road roller in 250 revolutions

$\large\sf\green{Solution:-}$

We have,

Radius of road roller= r = 42cm

Length of road roller= l = 80cm

Area covered in 1 revolution = C.S.A = $\huge\sf\red{2πrh}$

$\implies$2×$\frac{22}{7}$×42×80

$\implies$2×22×6×80

$\implies$$\fbox\red{21120cm²}$

So,area covers in 250 revolutions=

250×21120 = 5280000cm²

$\cancel\dfrac{5280000}{10000}m²$=528cm²