Question

Amir took 7 hours to complete a journey of this 50 km if one fifth of the journey was completed at 50 km per hour at what speed do the complete the remaining journey​

Answer 1

Answer:

5.88

Step-by-step explanation:

at 50 km/hr = 1/5 * 50 = 10 km

remaining = 40 km

t = d /S

7 = 10/50 + 40/ x

7 = 1/5 + 40/ x

34/5 = 40/x => x = 5.88 km /hr

Answer 2

Answer:

50 km/h

Step-by-step explanation:

50 km/h

One-fifth of the journey = 1/5 × 350

= 70 km

70 km was covered at 50 km/h, so the time taken to complete this journey=

70/50 = 7/5 hours = 1.4 hours.

Remaining time = 7 - 1.4 = 5.6 hours and the remaining distance = 350 - 70 = 280 km.

So, the remaining journey should be covered at 280/5.6 = 50 km/h