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\[\frac{280}{u}-\frac{280}{u+30}=3\]

Hi! Could you also explain how you came up with the equation? Thank you! :)

distance/speed=time

original speed=\[40 km/h\]

since distance = speed * t so...
Time=d/s
so,(280/x) - (280/x+30)= 3
so, Time - Time = Time :)

Hi phoebeco. understood ?? Medel plz :) :)

plz contribute to my medel.... have none :(
inspire me to help by giving medel

hope u r inspired:)

:) yes...........

thank you guys, so much!! :) well explained!