Practicing Success
A person travels 5x distance speed of 5 km/h, x distance at a speed of 5 km/h, and 4x distance at a speed of 6 km/h, and takes a total of 112 minutes. What is the total distance (in km) travelled by the person ? |
8 10 9 12 |
10 |
Formula used = Time = \(\frac{Distance }{Speed}\) Time 1 = \(\frac{5x }{5}\) Time 2 = \(\frac{x }{5}\) Time 3 = \(\frac{4x}{6}\) According to question , \(\frac{5x }{5}\) + \(\frac{x }{5}\) + \(\frac{4x}{6}\) = \(\frac{112}{60}\) \(\frac{56x}{30}\) = \(\frac{112}{60}\) x = 1So , Total distance = 5x + x + 4x = 10x = 10 × 1 = 10 km |