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Robyn2272
Robyn2272 Robyn2272
  • 28-09-2016
  • Mathematics
Answered

Questions

  1. If you walk for 1.5 hours and travel 7.5 km, what is your average speed

2.A bird flies at a speed of 15 m/s for 10 s, 20 m/s for 10 s, and 25 m/s for 5 s. What is the birds average speed?

Verified Answer :

milumil2000
milumil2000 milumil2000
  • 07-11-2016
  1. v=d/t=7.5/1.5=5 km/h

    2. v=d/t=(v1t1+v2t2+v3t3)/(v1+v2+v3)=(1510+2010+255)/(10+10+5)=
       =(150+200+125)/25=475/25=19 m/s
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