A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?

A 80 sec

B 89 sec

C 90 sec

D 95 sec

Solution

Correct Answer: Option B

ট্রেনসহ প্লাটফর্মের দৈর্ঘ্য =  (650 + 240 ) m
                               = 890 m
ট্রেনটি 240 m যায়  24 seconds
ট্রেনটি1m যায়  24/240 seconds 
ট্রেনটি 890m যায়  24×890/240 seconds = 89 seconds 

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