Math, asked by shivam588298, 11 months ago

plz. answer fast,
the length of a rollar is 40 cm and its diameter is 21 cm. it takes 300 complete revolution to move over to level the floor of a room . find the area of the room in meter sq.​

Answers

Answered by XxSpectreGUYxX
2

Answer: length=40cm

Diameter=21cm

Radius=21÷2=10.5cm

C.S.A=2πrh

=2×22÷7×10.5×40

=2640cm^2

Area of room in cm^2=2640×300

=792000cm^2

Area of room in m^2 =792000÷10000

=79.2m^2

Step-by-step explanation:

Similar questions