math
posted by wa
Anna starts the race 10m ahead of ping.ping runs at 20%faster tan anna`s speed.they will be level in the race after 9seconds.find average speed of anna

Steve
if anna's speed is s, then since distance = speed*time,
9s = 9(1.2s)10
9s = 10.8s  10
1.8s = 10
s = 5.55 m/s
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