Question

A train 280 m long is running at a uniform speed, of 63 km/hr. Find:

(i) The time taken by it to cross a telephonic pole.

(ii) The time taken by it to cross a bridge 210 m long.​

Answer 1

Step-by-step explanation:

to cross a telephone pole

distance of pole is negligible so time needed is

63 km /h =17.5m/s

280m/17.5=16seconds

to cross a bridge 210m long

total distance =210+280=490m

and speed =17.5m/s

so time needed is 490/17.5=28 seconds

[note:/b= ÷]

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