Question 804109
a scooterist drives at a speed of 40 km/hr and reaches his destination 5 minutes late. If he drives at a speed of 50 km/hr he reaches his destination 10 minutes early.How far is the destination? 
***
letx=distance to destination
travel time=distance/speed
..
arrive time at 40 km/hr=arrive time at 50 km/hr
{{{x/40-5/60=x/50+10/60}}}
{{{x/40-x/50=5/60+10/60}}}
{{{10x/2000=15/60}}}
{{{x/200=1/4}}}
x=200/4
x=50
distance to destination=50 km