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- Check units.
- Convert if needed.
- Apply S = D/T, D = S x T, or T = D/S.
Correct Answer: B
Correct Answer: B
Method / Topic: Time Speed Distance
The answer uses consistent units in the speed-distance-time relation.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Time Speed Distance
For equal distances, do not simply average 50 and 75. Time taken to go = 150/50 = 3 hours. Time taken to return = 150/75 = 2 hours. Total distance = 300 km and total time = 5 hours. Average speed = 300/5 = 60 km/h.
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Check units.
- Convert if needed.
- Apply S = D/T, D = S x T, or T = D/S.
A car travels 150 km at 50 km/h and returns the same distance at 75 km/h. What is the average speed for the whole journey?
Explanation
Correct Answer: B
Method / Topic: Time Speed Distance
The answer uses consistent units in the speed-distance-time relation.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Time Speed Distance
For equal distances, do not simply average 50 and 75. Time taken to go = 150/50 = 3 hours. Time taken to return = 150/75 = 2 hours. Total distance = 300 km and total time = 5 hours. Average speed = 300/5 = 60 km/h.
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