Others Maths Puzzle

Q:- Rajesh takes 5 hrs more than Rakesh to cover adistance of 500km.If instead Rajesh doubles his speed he would reach the destination 7.5 hrs before Rakesh.Find Rajesh's speed.

Read Solution (Total 2)

TIME TAKEN BY RAKESH=X
TIME TAKEN BY RAJESH=X+5 SPEED=500/X+5
NEW SPEED = 500*2/X+5
NEW TIME =500/(500*2/X+5)
X-500/(500*2/X+5)=7.5
X-X+5/2=7.5
X=10
RAJESH TIME = 15HRS
SPEED = 500/15
100/3 KM/HR ans
10 years agoHelpfull: Yes(1) No(1)

33.33 km/hr
10 years agoHelpfull: Yes(0) No(5)

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