In what time will a bus 200 m long cross in the road, if its speed be 72 km/hr?
Choose the correct choice:
A) 15
B) 20
C) 14
D) 10
E) 12
Speed = 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 m/sec   Time taken= 200/20= 
<gadget id="calculator">200/20</gadget>
<output>10</output>
10 sec.   Answer:10
<result>D</result>
In what time will a bus 200 m long cross in the road, if its speed be 72 km/hr?