Driving to work
Algebra
Level
3
If John drives to work at 60 km/h he will be 1 minute late; if he drives to work at 90 km/h he will be 1 minute early. What distance( in km ) does he travel to go to work?
The answer is 6.
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1 solution
60(t+1)=90(t-1) now t=5 minutes so the distance is 60(t+1)/60= 6 km.