Priya covers journey from kavali to nellore by car at average speed of 70 Km/hr. She returns back by scooty with an average speed of 70 Km/hr. Find her average speed during the whole journey?
Choose the correct choice.
A) 60Km/hr  B) 70Km/hr  C) 80Km/hr  D) 90Km/hr  E) 100km/hr
Explanation:   Average speed = 2 xy/x+y   = 2*70*70/140= 
<gadget id="calculator">2*70*70/140</gadget>
<output>70</output>
70 Km/hr   Answer: Option 70Km/hr
<result>B</result>
Priya covers journey from kavali to nellore by car at average speed of 70 Km/hr. She returns back by scooty with an average speed of 70 Km/hr. Find her average speed during the whole journey?