In a kilometer race, A beats B by 40 meters or by 5 seconds. What is the time taken by A over the course?
| Question | In a kilometer race, A beats B by 40 meters or by 5 seconds. What is the time taken by A over the course? | |
| Type | multiple_choice | |
| Option | 1 minute 57 seconds. | incorrect |
| Option | 2 minutes. | correct |
| Option | 1.5 minutes. | incorrect |
| Option | None of these. | incorrect |
| Solution | A runs 1km = 1000 m, it means B runs 1000 – 40 = 960 meters Time is taken by B for 40 meters = 5 seconds Time is taken by B for 960 meters = 5/40 × 960=120 seconds The time in which B covered 960 meters, A has covered 1000 meters. ∴ A’s time over the course = 120 seconds = 2 minutes | |