Two men start together to walk a certain distance, one at 4 kmph and another at 3 kmph.The former arrives half an hour before the latter. Find the distance.  Choose the most appropriate option.
A) 6 kilometre	B) 61 kilometre	C) 8 km	D) 9 km	E) None of these
Let the distance be x km. Then,   x/3 - x/4 = 1/2   (4x - 3x)/12 = 1/2   x = 6 km   6 kilometreNSWER:6 kilometre
<result>A</result>
Two men start together to walk a certain distance, one at 4 kmph and another at 3 kmph.The former arrives half an hour before the latter. Find the distance.