- A30 min
- B4 2/7 min
- C15 min
- D60 min
Step-by-Step Solution
The faster gains 10 km every hour; 5 km takes h min min uses the sum, 70 km/h.)
Answer: A) 30 min
Two bikers ride the same way round a 5 km circuit at 40 km/h and 30 km/h, starting together. After how many minutes does the faster first lap the slower?
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