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it took ms clayton 20 minutes to drive from l'amoreaux collegiate institute to the university of toronto (a distance of 22 km). she used a combination of local and highway roads. when she was on the local road, she drove at 60 km/h, and 100km/h when she was on the highway. how much time did she drive on each road?

Respuesta :

raphealnwobi

Ms Clayton drove on local road for 17 minutes and highway for 3 minutes

Speed

Speed is the ratio of total distance travelled to total time taken. It is given by:

Speed = distance / time

At 60 km/h:

60 = d₁ / t₁

d₁ = 60t₁

At 100 km/h:

100 = d₂ / t₂

d₂ = 100t₂

d₁ + d₂ = 22

60t₁ + 100t₂ = 22   (1)

Also, total time is 20 min (20/60 = 0.33):

t₁ + t₂ = 0.333   (2)

t₁ = 0.283 h = 17 minutes , t₂ = 0.05 h = 3 minutes

Ms Clayton drove on local road for 17 minutes and highway for 3 minutes

Find out more on Speed at: https://brainly.com/question/3004254

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