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Total distance to be travelled, s = 100 + 1000 = 1100 m Velocity, v = 60 km/hr = 50/3 m/s Therefore, Time taken to cross the bridge, t = <img class=Wirisformula src=/application/zrc/images/qvar/PHEN11039782.png alt=straight s over straight v space equals space fraction numerator 1100 over denominator bevelled 50 over 3 end fraction space equals space 66 space sec align=middle data-mathml=«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac mathcolor=¨#191919¨»«mi mathvariant=¨normal¨»s«/mi»«mi mathvariant=¨normal¨»v«/mi»«/mfrac»«mo mathcolor=¨#191919¨»§#160;«/mo»«mo mathcolor=¨#191919¨»=«/mo»«mo mathcolor=¨#191919¨»§#160;«/mo»«mfrac mathcolor=¨#191919¨»«mn»1100«/mn»«mfrac bevelled=¨true¨»«mn»50«/mn»«mn»3«/mn»«/mfrac»«/mfrac»«mo mathcolor=¨#191919¨»§#160;«/mo»«mo mathcolor=¨#191919¨»=«/mo»«mo mathcolor=¨#191919¨»§#160;«/mo»«mn mathcolor=¨#191919¨»66«/mn»«mo mathcolor=¨#191919¨»§#160;«/mo»«mi mathcolor=¨#191919¨»sec«/mi»«/math»>

A train 100 m long is moving with a velocity of 60 km/hr. Find the time it takes to cross the bridge 1 km long.

Total distance to be travelled, s = 100 + 1000 = 1100 m

Velocity, v = 60 km/hr = 50/3 m/s

Therefore,

Time taken to cross the bridge, t = $straight s over straight v space equals space fraction numerator 1100 over denominator bevelled 50 over 3 end fraction space equals space 66 space sec$

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