since time distance/speed,
100/s = 100/(s+10) + 1/2
s = 40
A woman drove a distance of 100km/h, on the journey she drove 10km/h faster and took 30min less. What was her speed on the outward journey?
6 answers
What if she was rolling, anthony?
Steve, i'm still trying to use you way...
Steve, can you explain a bit furthur, please???
compare the times.
The time it took to cover 100km at speed s is 100/s
That was 1/2 hour more than the time it took to cover 100km at the faster speed, s+10
The time it took to cover 100km at speed s is 100/s
That was 1/2 hour more than the time it took to cover 100km at the faster speed, s+10
Mr. tan makes monthly visits to his parents in Malacca a distance of 240 km from Singapore. he finds that if he increases the average speed by 10km/h, he could save a total of 20min for the journey. find the original speed of Mr. tan.
2 answers