SOLUTION: if a driver drives at a speed of 24 km/hour , he reaches his destination 5 minutes too late . but if he drives at a speed of 30km/hour , he reaches his destination 4 minutes too so
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Question 537056: if a driver drives at a speed of 24 km/hour , he reaches his destination 5 minutes too late . but if he drives at a speed of 30km/hour , he reaches his destination 4 minutes too soon . how far is his destination?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if a driver drives at a speed of 24 km/hour , he reaches his destination 5 minutes too late . but if he drives at a speed of 30km/hour , he reaches his destination 4 minutes too soon . how far is his destination?
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Late DATA:
rate = 24 km/hr ; distance = x km ;time=d/r= x/24 hrs = 60(x/24)= 2.5x minutes
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Early DATA:
rate = 30 km/hr ; distance = x km ;time=d/r = x/30 hrs = 60x/30 = 2x mi2.5nutes
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Equation:
Late time - Early time = 9 minutes
2.5x - 2x = 9
0.5x = 9
x = 18 km
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Cheers,
Stan H.
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