The length and breadth of a playground are 36 m and 21 m respectively. Flagstaffs are required to be fixed on all along the boundary at a distance of 3 m apart. The number of flagstaffs will be?
37
38
39
40
Correct Option: B
Perimeter = 2 x (36 + 21 ) m = 144 m ∴ Number of flagstaffs = 144 / 3 = 38
