Roja and Pooja start moving in the opposite directions from a pole. They are moving at the speeds of 7 km/hr and 3 km/hr respectively. After 4 hours what will be the distance between them?	Select
A) 22 km
B) 40 km
C) 65 km
D) 18 km
E) 16 km
Distance = Relative Speed * Time   = (7 + 3) * 4= 
<gadget id="calculator">(7 + 3) * 4</gadget>
<output>40</output>
40 km   [ They are travelling in the opposite direction, relative speed= sum of the speeds].   Answer: 40 km
<result>B</result>
Roja and Pooja start moving in the opposite directions from a pole. They are moving at the speeds of 7 km/hr and 3 km/hr respectively. After 4 hours what will be the distance between them?