Multiple choice

What is the respective ratio between times taken by a train 320m. long to cross a electric pole and a bridge of 75 m. long? 320 मी. लम्बी एक ट्रेन द्वारा इलेक्ट्रिक पोल और 75 मी. लम्बे पुल को पार करने में लिये गये समयों के बीच क्रमशः क्या अनुपात है?

  1. 60 : 79

  2. 64 : 79

  3. 64 : 69

  4. 21 : 39

  5. None of these इनमें से कोई नहीं

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Time to cross pole = 320/v (train covers its own length). Time to cross bridge = (320+75)/v = 395/v (train covers its length plus bridge). Ratio = (320/v) : (395/v) = 320 : 395 = 64 : 79 after dividing by 5. Option B matches.