Câu 4: trang 145 - toán tiếng AnhThe distance between 2 cities A and B is 135km. A motorbike...

In conclusion, the motorbike will be 30 kilometers away from city B after traveling for 2 hours and 30 minutes.

Therefore, after traveling for 2 hours and 30 minutes, the motorbike will be 30 kilometers away from city B.

So, after traveling for 2 hours and 30 minutes, the motorbike will be 135 km (total distance) - 105 km (distance covered) = 30 km away from city B.

After 2 hours and 30 minutes, the motorbike would have covered a distance of 42 km/h x 2.5 hours = 105 km.

The distance covered by the motorbike after 2 hours and 30 minutes can be calculated using the formula: distance = speed x time.