To reach a point B at 10 am from point A., Abhinav travels at an average speed of 15 km/h. He reaches the point B at 12 noon, if he travels at an average speed of 10 km/h. Find the average speed of Abhinav if he intends to reach the point B at 9 am ? (in kmph) ?
A. 15 and 2/7
B. 17 and 1/7
C. 13 and 2/7
D. 17 and 2/7
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calculate the distance from A to B if from A to C =10km,from C to D =10km and from D to B = 5km
but ans is option b
how is it possible can u explain...
x/10-x/15=2
x=60km
to reach at 10am when avg speed is 15, it takes 4 hrs
if intends to reach at 9am, means 3 hrs, avg speed = 60/3= 20km/h
ans?