Question 138762
The speeds of three cars are in the ratio 5:4:6.The ratio between the time taken 
:
Time varies inversely with speed: time = dist/speed:
:
Find the least common multiple of 5, 4, 6; that would be 60; use that for dist:
{{{60/5}}}; {{{60/4}}}; {{{60/6}}}
that would give you: 12:15:10