⟩ An athlete runs at u km/h for t1 hrs., v km/h for t2 hrs. Find avg. speed of an athlete for entire lap? 1) (ut1+vt2)/(t1+t2) 2) (u+v)t2/(t1) 3) (t1+vt2)/(u+v) 4) (u+v)/(t2+t1)
1) (ut1+vt2)/(t1+t2)
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