Question

The length of a roller is 40 cm and its diameter is 21 cm. It takes
revolutions to move once over to level the floor of a room. Find
room in m2.
: 225 m high. Find​

Answer 1

Answer:

Step-by-step explanation:L=40

D=21

R=d/2

2×22/7×21/2×40

=2460cm

22500/2460

=8.522 revolutions