How long will a car take to run round a circular field of radius 2/π metres. If car runs at the rate of 8km/hr ?
Select.
A) 2.5 sec.	B) 10 sec.	C) 3 sec	D) 2 sec	E) 1.8 sec
Speed = 8 km/hr = 8*5/18 = 20/9 m/sec   distance = 2πr=2π*2/π=4 m   time taken = 4*9/20= 
<gadget id="calculator">4*9/20</gadget>
<output>9/5 = around 1.8</output>
1.8 sec.   Answer 1.8 sec
<result>E</result>
How long will a car take to run round a circular field of radius 2/π metres. If car runs at the rate of 8km/hr ?