Riya covers journey from kavali to nellore by car at average speed of 50 Km/hr. She returns back by scooty with an average speed of 50 Km/hr. Find her average speed during the whole journey?  Choices:
A) 30Km/hr B) 50Km/hr C) 80Km/hr D) 90Km/hr E) 100km/hr
Explanation:   Average speed = 2 xy/x+y   = 2*50*50/100= 
<gadget id="calculator">2*50*50/100</gadget>
<output>50</output>
50 Km/hr   Answer: Option 50Km/hr
<result>B</result>
Riya covers journey from kavali to nellore by car at average speed of 50 Km/hr. She returns back by scooty with an average speed of 50 Km/hr. Find her average speed during the whole journey?