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Question #73dbc

1 Answer

Mar 15, 2017

The girl's average speed was $5 \frac{s q}{s}$ $5 (sq)/s$

Explanation:

Her average speed was: $S a v = \frac{D t}{T t}$ $Sav = (Dt)/(Tt)$

Where total distance: $D t = 6 s q + 26 s q + 23 s q = 55 s q$ $Dt = 6sq + 26sq + 23sq = 55sq$

And total time: $T t = 2 s + 4 s + 5 s = 11 s$ $Tt = 2s + 4s + 5s = 11s$

$S a v = \frac{55 s q}{11 s} = 5 \frac{s q}{s}$ $Sav = (55sq)/(11s) = 5(sq)/s$

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