| Question | A running man crosses a bridge of length 500 meters in 4 minutes. At what speed he is running? | |
| Type | multiple_choice | |
| Option | 8.5 km/s | incorrect |
| Option | 7.5 km/s | correct |
| Option | 9.5 km/s | incorrect |
| Option | 6.5 km/s | incorrect |
- Distance = 500 meters
- Time = 4 minutes ⟶ 4 x 60 = 240 seconds
Speed =500⁄240=25⁄12m/s
We need answer in km/hr: Speed in km/hr=25⁄12*18⁄5=90⁄12⟶30⁄4= 7.5 km/s
