A bus covered a distance of 250 km, partly at an average speed of 40 kmph and partly at 60 kmph.
A bus covered a distance of 250 km, partly at an average speed of 40 kmph and partly at 60 kmph. If the total time taken is 5 hours, then the distance covered at 40 kmph is
Answer/Solution
100km
Steps/Work
Let the partial distance covered at 40 kmph be X
Let the another partial distance covered at 60 kmph be (250 - x)
Thus, x/40 - (250 - x)/60 = 5
or, x/40 + (250 - x)/60 = 5
or, (3x + 500 - 2x)//120 = 5
or 500 + x = 600
x=100
ANSWER:C
Let the another partial distance covered at 60 kmph be (250 - x)
Thus, x/40 - (250 - x)/60 = 5
or, x/40 + (250 - x)/60 = 5
or, (3x + 500 - 2x)//120 = 5
or 500 + x = 600
x=100
ANSWER:C