Multiple choice

X and Y start walking towards each other at 8:00 a.m. at the speed of 3 km/hr and 4 km/hr, respectively. They were initially 17.5 km apart. At what time do they meet?

  1. 10:30 a.m.

  2. 10:30 p.m.

  3. 11:30 a.m.

  4. 11:30 p.m.

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Relative speed = 3 + 4 = 7 km/hr. Distance = 17.5 km. Time to meet = 17.5 / 7 = 2.5 hours. 8:00 a.m. + 2.5 hours = 10:30 a.m.

AI explanation

Using the concept of relative speed for objects moving towards each other, their combined speed is 3 km/hr plus 4 km/hr equals 7 km/hr. The time taken to meet is the total distance divided by this relative speed, which is 17.5 km divided by 7 km/hr, equaling 2.5 hours. Adding 2 hours and 30 minutes to the start time of 8:00 a.m. results in a meeting time of 10:30 a.m.