TwPeter and Beckon start to walk in the same direction together. If Peter’s…
2023
TwPeter and Beckon start to walk in the same direction together. If Peter’s speed is 5 km/h and Beckon’s speed is 6 km/h, find out the time duration after which they are 17 km apart.
- A.
15
- B.
17
- C.
19
- D.
20
Attempted by 51 students.
Show answer & explanation
Correct answer: B
Answer: 17 hours
Explanation:
Find the relative speed: 6 km/h − 5 km/h = 1 km/h.
Required separation distance: 17 km.
Time = distance ÷ relative speed = 17 ÷ 1 = 17 hours.
Therefore, they will be 17 km apart after 17 hours.