Question

A cylindrical roller 2.5m in length 1.5 in radius rolled on a road was found to covet the area of 16500m^2. How many revolutions does it make?

Answer 1

there are 2100 revolution does it make to complete 16500msq......I hope it was correct

Answer 2

We have,length of cylinderical roller, h = 2.5 m radius of the cylinderical roller, r = 1.5 m CSA of roller = 2π r h so, CSA of roller = 2×227×1.5×2.5 = 1657 m2so,area covered in 1 revolution = 1657 m2 Total area covered = 16500 m2 no. of revolutions taken to cover 16500 m2 = Total area covered area covered in 1 revolution no. of revolutions taken to cover 16500 m2 = 16500165/7 = 700