Question

23. The length of a roller is 50cm and diameter is 21 cm. It takes 500 complete
revolutions to move once over to level the floor of room. Find area of room in​

Answer 1

Answer:

actually I don't know this question answer

Answer 2

Answer:

16,50,000cm²

Step-by-step explanation:

formula for finding lateral surface area ›

$2 \times \pi \times r \times \: h$

• Area of that room= (lateral surface of roller)(500)

• Lateral surface area of roller = 2πrh

=2(22/7)(10.5)(50)

=3,300 cm²

• Therefore, area of that room = (3300)(500)=16,50,000 cm²