I tried to solve this distance speed and time question, but I got quite stumped?

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Answer 1 · 2017-12-17T07:38:41

#4km"/"h# is Misha's speed

With questions involving distance, speed and time, if you know two of the three values, you can calculate the third value.

The formula is:

#"Speed" = "Distance"/"Time"" "larr# this gives 3 formulae:

#S =D/T" " and" "T=D/S" "and" " D= SxxT#

For Dina:

#D=10km" "and" "S=5km"/"h#

Find the #"Time"# she took: #" "T= 10/5 = 2 hours#

For Masha

#D = 8km" "#(she still had 2km of the 10km left to cycle)

#T = 2 hours" "#(Dina and Masha started at the same time)

#S = D/T = 10/2 = 4km"/"h#