<PRE><B>Question 897700</B>
Mark drove to visit his grandma at 75km/hr. He returned at 50km/hr. It took 45 minutes longer to return home than to get to his grandmas house, how long dod it take him to get home?
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To Grandma DATA:
rate = 75 km/hr ; distance = x km ; time = d/r = x/75 hrs
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From Grandma DATA:
rate = 50 km/hr ; distance = x km ; time = d/r = x/50 hrs
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Equation:
time - time = 3/4 hr
x/50 - x/75 = 3/4
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Multiply thru by 300 to get:
6x - 4x = 36
2x = 36
x = 18 km (distance)
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Cheers,
Stan H.
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