Question

Cylindrical roller is used to paint a rectangular dais.The length of the roller is 1.4m and its diameter is 0.7m.If the roller is 1.4m and its diameter is 0.7m.If the roller rollsover the dais 50times completely,fid the area if dias

Answer 1

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Answer 2

The area of dias is 154 sq.m.

Step-by-step explanation:

Diameter of cylindrical roller = 0.7 m

Radius of cylindrical roller = $\frac{0.7}{2}=0.35$

Length of roller = 1.4 m

Curved surface area of roller = $2 \pi r h = 2 \times \frac{22}{7} \times 0.35 \times 1.4$

Curved surface area of roller = 3.08 sq.m.

Area covered in 1 round =  3.08 sq.m.

Area covered in 50 round =  $3.08 \times 50=154 sq.m.$

Hence The area of dias is 154 sq.m.

#Learn more:

The length and diameter of a roller are 2.5m and 1.4m respectively. How much area will be planned by roller in 10 revolutions?

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