Two cars start from the same place at the same time in the same direction. The first car runs at a constant speed of 50 km/h and the second car runs at 60 km/h. What is the distance between them after 3 hours 30 minutes? MCQ with Answer and Explanation
Two cars start from the same place at the same time in the same direction. The first car runs at a constant speed of 50 km/h and the second car runs at 60 km/h. What is the distance between them after 3 hours 30 minutes?
A. 35 km
B. 45 km
C. 40 km
D. 30 km
Answer: Option A
Solution (By JKSSB Mock Tests)
Relative speed = 60 - 50 = 10 km/h. Time = 3.5 hours. Distance between them = Relative Speed * Time = 10 * 3.5 = 35 km.
A stream flows at 3 km/h. A boat can row 9 km/h in still water. How much time does it take to go 24 km downstream and return upstream to the starting point?
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