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A road roller is a cylinder 2.5 m long of diameter 1.4 m. How many complete revolutions must it make to level a playground 110 m long and 55 m wide exactly once? Take π = 22/7.

Competition practiceAreas & Volumes
  • A550
  • B275
  • C605
  • D1100

Step-by-Step Solution

Circumference = m, so one revolution covers . The playground measures . Number of revolutions = 6050/11 = 550.
Answer: A) 550

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