A man walking at the rate of 6km per hour crosses a square field diagonally in 9 seconds the area of the field is	Choices
A) 110sq.m  B) 111.5aq.m  C) 112.5sq.m  D) 114sq.m  E) None of these
Explanation:   Distance covered in 9 seconds = (6×1000/3600)×9 = 15m   Diagonal of square field = 15m   Side of square =a then diagonal of that square= √2 a   Hence area of the square = a2= (152)/2 =112.5 sq.m   Answer: Option 112.5sq.m
<result>C</result>
A man walking at the rate of 6km per hour crosses a square field diagonally in 9 seconds the area of the field is