| Question | Two boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart? | |
| Type | multiple_choice | |
| Option | 3 hours | incorrect |
| Option | 4 hours | correct |
| Option | 5 hours | incorrect |
| Option | 6 hours | incorrect |
Both the boys are in motion so we will consider relative speed to find the time.
Relative speed = 12 – 10 = 2 km/hr
Distance = 8 km Time =8⁄2= 4 hours (Option B)