x.14.Aroller2 m long and 0.7 m in diametermakes 60 revolutions in a mi

1.	x.14.Aroller2 m long and 0.7 m in diametermakes 60 revolutions in a minute on aroad. The area rolled by it is:(A) 264 m2(C) 66 m2.(B) 132 sq.cm(D) none of these
Answer» radius = 35 cm length = 200cm therefore its a rollers wheel so, curved surface area = 2 * 22/7 * 35 * 200 = 44000cm² = 4.4 m² if it takes 60 revolution therefore it covers the area of = 4.4 * 60 = 264 m² Like my answer if you find it useful!

x.14.Aroller2 m long and 0.7 m in diametermakes 60 revolutions in a minute on aroad. The area rolled by it is:(A) 264 m2(C) 66 m2.(B) 132 sq.cm(D) none of these

Answer»

radius = 35 cm

length = 200cm

therefore its a rollers wheel

so, curved surface area = 2 * 22/7 * 35 * 200

= 44000cm²

= 4.4 m²

if it takes 60 revolution therefore it covers the area of = 4.4 * 60 = 264 m²

Like my answer if you find it useful!