Question

A roller 150cm long has a diameter of 70m To level a playground it takes 750 complete revolutions Determine the cost of leveling the playground at the rate of rupees 75 per/square meter​

Answer 1

Answer:

Rs 1856.25

Step-by-step explanation:

Area of playground = 750 × CSA of roller

= 750 × 2 × 22÷7 × 35 × 150

= 750 × 33000

= 24750000 cm^2

= 2475 m^2

Cost of leveling = 2475 × 0.75

= Rs 1856.25

Regards

Answer 2

curved Surface area of roller = 2×22/7×35×150 = 330 m²

now area covered by it in 750 revolutions = 750 ×330 =

247500 m²

cost of leveling 247500 m² = 247500/75 =3300 rs