Two cars started a journey on the same road from opposite starting points. The speed of the first car is 120 km/h and the speed of the other
car is 60 km/h. If it takes the first car 9 hours to cover half the distance,
how long will it take the second car to cover the same distance?

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step-by-step explanation:

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.

answer: the answer is 100 x 12,500, which is 1,250,000.

step-by-step explanation: emily solved for a part when she should have solved for the whole.  

875,000 should be the numerator of the equivalent ratio.  

70 x 12,500 is 875,000.