Question 875150
andrew goes by bus for part of his way to work and walks the rest. the speed of the bus is 24 km/h and he walks at 9km/h. if the distance between the house and the office is 30 km and it takes him 1 1/3 hours to go to the office, how long does he spend walking?
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let x=walking distance
30-x=bus distance
travel time=distance/speed
{{{x/9+(30-x)/24=4/3}}}
LCD:72
8x+90-3x=96
5x=6
x=6/5
x/9=6/45 hr=8 min
how long does andrew spend walking? 8 min