Question

Doris drives at a steady speed of 40 km/h.

If she sets off at 1.35pm and arrives at 3.50pm, how far has she travelled?

Answer 1

She has travelled 50km.

Explanation:

The difference in time from 1.35pm to 3.50 is 75 mins, or 1hr 15mins.

She drives at 40km/h.

1hr = 40km

15mins (or 1/4 of an hour) = 10km

40 + 10 = 50

She has travelled 50km.

Answer 2

• 90 km

Explanation:

Find the time in travel:

• t =
• 3:50 - 1:35 =
• 2:15 hrs =
• 2.25 hrs

Find the distance travelled:

• d = t*s
• d = 2.25 * 40 = 90 km