if the area of square ground is 16 hectare . how much time will an athelete take to round the field at an average of 12 km per hour?
option
1) 12 mins
2) 6 mins
3) 8 mins
4) 26 mins
5) none of these

• 3) 8 min.
  If side of square=x, then x^2=16 hectare, =16/100=0.16 km^2
  Side of square(in Km)=Sqrt(0.16)=0.4 km
  One round of the field=perimeter of square=4*0.4=1.6 km
  Time taken to cover(in hrs) 1.6 km @12 kmph= 1.6/12=4/30 = 8/60 = 8 min.
• 11 years agoHelpfull: Yes(11) No(1)
• 1 hectare 2=0.01 km2;
  =>16 hectare2=0.16 km2;
  area=.16km2;
  side of sqare (field)=sqrt(.16);
  side=0.4 km;
  total distance=perimeter of square=4*.4;
  time=disatnce/speed=4*.4/12*60 min=8 min is the answer.
• 9 years agoHelpfull: Yes(0) No(0)