1.

A hallow cylinder of radius 5 cm takes six turns about its axis on a horizontal plane and there by covers a distance which is 6π tines its length.what is the area of the curved surface of the cylinder

Answer»

Step-by-step EXPLANATION:

given,

r=5cm

distance COVERED by cylinder=6πl

area covered in 6 turns=6×2πr

hence, 12πr=6πl

12r=6l

l=12×5/6. (r=5)

l=10cm

curved surface area of cylinder=2πrh

2×3.14×5×10. (l=h)

314cm^2



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