A train takes 1 hour 40 mins. to travel b/w P and Q. If it travels at \(\frac{2}{7}\) of its usual speed, how long will it take to travel b/w P and Q?
Answer & explanation
Correct answer: option 2
S ∝ \(\frac{1}{t}\)
Speed → 7 : 2
Time → 2 : 7
↓ ↓
×50 ×50
↓ ↓
100 min 350 mins
(given)
⇒ Train will take = \(\frac{350}{60}\) = 5 hours 50 mins.