The diameter of a garden roller is 15.4 cm and it is 20.5 cm long. Fin

1.	The diameter of a garden roller is 15.4 cm and it is 20.5 cm long. Find the area covered by it in 60 revolutions? *
Answer» ANSWER: Diameter = 1.4 m r = d/2 r = 1.4/2 r = 0.7m curved surface AREA of CYCLINDER = 2 * 22/7 * r^2 = 2 * 22/7 * 0.7 * 0.7 = 8.8 m^2 No of REVOLUTION = 5 Therefore = 8.8 5 = 44 m2*

The diameter of a garden roller is 15.4 cm and it is 20.5 cm long. Find the area covered by it in 60 revolutions? *

Answer»

Diameter = 1.4 m

r = d/2

r = 1.4/2

r = 0.7m

curved surface AREA of CYCLINDER = 2 * 22/7 * r^2 = 2 * 22/7 * 0.7 * 0.7 = 8.8 m^2

No of REVOLUTION = 5

Therefore = 8.8 * 5 = 44 m2