Question

a car travels first 30 km with a uniform speed of 60 km per hour and next 30 km at a uniform speed of 40 km per hour calculate the total time of journey?​

Answer 1

Answer:

75 minutes or 1 hour and 15 minutes

Explanation:

30/60 = 1/2

1/2 of an hour is 30 minutes

30km/40km = 3/4

3/4 of an hour = 45 minutes

30 minutes + 45 minutes = 75 minutes or 1 hour and 15 minutes.

I hope this helps. x

Answer 2

Answer:

I think 75mins or 1hr 15mins

Explanation:

If 60km=60mins. then 30km=30mins

Next if 40km=60mins then 30km =45mins(can be done by cross multiplication)

Therefore total time= 30mins+45mins= 75mins or 1hr 15mins