Ben drives from town A to town B. He drives 2/5 of the journey at 40 km/h and covers the remaining 180 km in 3 hours. (a) What is the distance between town A and town B? (b) What is Ben’s average speed for the journey? Type your answers (without commas) as: (a)_______units (b)______units
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Step-by-step explanation:
let total distance be x
2x/5 km in 40km/hr
remaining= x-2x/5=3x/5
3x/5=180
x=180×5/3=300km
2x/5 in 40km/hr
2×300/5=120km
t=s/v=120/40=3hr
average speed = total distance /total time
=120+180/3+3=300/6=50km/hr
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