The diameter of a roller 120 cm long is 84 cm. If it takes 500 complete revolutions to level a playground, determine the cost of travelling it at the rate of 30 paise per square meter.
The diameter of a roller 120 cm long is 84 cm. If it takes 500 complete revolutions to level a playground, determine the cost of travelling it at the rate of 30 paise per square meter.