Question

the radius of a roller is 35cm and it's length is 3m if it takes 30 revolutions to level a playground find the area of playground and the cost of leveling the ground at Rs 5 per m2​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

radius = 35cm

height=3m

          =300cm

area of roller =$2\pi rh$

                        = 2 × 22/7  × 35 × 300

                        = 44 × 1500

                        = 66000cm²

area of 1 revolution = area of roller = 66000cm²

area of 30 revolutions = 30 × 66000

                                     = 1980000

area of playground= 1980000cm²

                                = 1980000 × 1/100 × 1/100

                                = 198 m²

cost of leveling the ground = 198 × 5

                                             =  Rs 990