physics
posted by waqas on .
Lance arrives early at the airport (with
owers and balloons in hand) to welcome a
friend. Her plane is delayed. While waiting, he notices that it takes 2 minutes 47 seconds to get down the hall on the moving sidewalk. While walking (not on the moving sidewalk), it took him 110 seconds. If he walks while on the sidewalk how long will it take him (s)?

Velocity walking on sidewalk=velocitysidqalk+velocitywalking
= distance/time1+distance/time2
= distance/167sec+ distance/110 seconds
= 110 distance+167distance/(110*167)
or 277 *distance/(110*167)
or
distance/timewalkingonsidewalk=above
timewalkingonsidewalk=110*167/277