GMAT Exam Category

A car covers a certain distance going at a speed of 60 kmph and returns to the starting point at a speed of 40 kmph.Find the average speed for the whole journey.
a)48 kmph b)42 kmph c)34 kmph d)40 kmph

Read Solution (Total 2)

ans a
the average speed =2xy/(x+y)
average speed = 2*(60*40)/(60+40)
= 2*60*40/100
= 48 kmph
9 years agoHelpfull: Yes(0) No(0)

ans:48kmph
average speed=2*60*40/(40+60)
48 kmph
7 years agoHelpfull: Yes(0) No(0)

GMAT Other Question

A person covers a certain distance at a certain speed. If he increases his speed by 25 % then he takes 12 minutes less to cover the same distance. Find the time taken by him initially to cover the distance at the original speed
a)3 hrs b)2 hrs c)1 hr d)7 hrs
What is the time taken by a train running at 54 km/hr to cross a man standing on a platform, the length of the train being 180 m?
a)6 seconds b)12 seconds c)16 seconds d)18 seconds