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ICSE Class 7 Answered

A TRAIN 140 M LONG IS RUNNING AT 60 KM PER HOUR. IN HOW MUCH TIME  WILL IT PASS A TUNNEL 260 M LONG ?

Asked by sms_salunke | 28 Jul, 2018, 05:47: AM
Expert Answer
begin mathsize 16px style Total space distance space travelled space by space straight a space train space equals space 140 space plus space 260 space equals space 400 straight m space
1 km space equals space 1000 straight m space rightwards double arrow 400 straight m space equals space 0.4 space km
Speed space equals space 60 space km divided by hr
We space know space that comma
space Speed space equals space fraction numerator Distance space over denominator Time end fraction
rightwards double arrow Time space equals space fraction numerator Distance space over denominator Speed end fraction space equals space fraction numerator 0.4 over denominator 60 space end fraction space equals space 0.0067 space hr space equals space 0.4 space min...... Since comma 1 space hr space equals space 60 space min



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