Mr. john travelled a distance of 15 km/hour partly by car at the speed of 9 km h and partly by motorcycle at the speed of 18km/hour Find the distance travelled by the car.
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Answered by
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Step-by-step explanation:
let x be time taken by car
y be time taken by motorcycle
9x+18y=15
he travelled 1hour
x+y=1
9(1-y)+18y=15
9-9y+18y=15
9y=-6
y=-6/9
y=2/3
x=1-y=1-2/3=1/3
distance travelled by the car=9×1/3=3km
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Answer:
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