a train 120m long is running at 54 km per hour in how much time will it pass a bridge 180 M long
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let the km is x
120/54 =180 /x
we have to using cross multiplely
120×x = 54×180
x=54×180/ 120
27×3
81 ans
120/54 =180 /x
we have to using cross multiplely
120×x = 54×180
x=54×180/ 120
27×3
81 ans
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