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A train goes through a `1100 m` long tunnel at a constant speed of `72 km//h`. The last compartment comes out one minute after the entry of engine in the tunnel. Find the length of train (including engine).A. `80 m`B. `100 m`C. `1200m`D. `1000m` |
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Answer» Correct Answer - B `t=60 sec` Total distance travelled `=1100+L` Speed `=72 (km)//(hr)=20 m//sec` `rArr60=(1100+L)/(20)rArr1200=1100+L` `rArrL=100 m` |
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