Question

the length of a roller is 40 cm and its diameter is 21 cm It takes 300 complete Revolution to move 1 to 10 the level the floor of a room find the area of a room in metres square

Answer 1

2x22 upon 7x10. 5 this is the answer

Answer 2

Answer:

Step-by-step explanation:

Height:40cm

Diameter:21cm

CSA: 2πrh

dπh

21×22/7×40

2640cm^2

For 300 revolutions: 2640×300

79200cm^2