Question

A man drove from Rizal to Taytay in a total of 150 km in 3 hours. Along the highways, he averaged 90 km per hour but slowed down along the towns and averaged 30 km per hour. How long did he drove along the highways?

Answer 1

(d/90)+((150-d)/30)=3
d/90+5-d/30=3
-2d/90=-2
d/90=1
d=90 km

Answer 2

It's asking for the number of hours he drove on the highways. The choices are: 1, 1.5, 2, 2.5

Answer 3

1.5 hours =90 min

Answer 4

x=time travelled at speed 90
y=time travelled at speed 30
x+y=3
90x+30y=150
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solve the above 2 to get x=1 and y=2

he drove along the highways for 1 hour

Answer 5

@ Noureldin-2022
(d/90)+((150-d)/30) =3
d/90+5-d/30=3
-2d/90 =-2
d/90=1
d=90 km

at highways, speed=90km/hr and distance travelled d=90 km

so time = distance/speed = (90 km) / (90km/hr) = 1 hr