Home » Aptitude » Speed, Time and Distance » Question
  1. A man starts from a place P and reaches the place Q in 7 hours.
    He travels
    1
    th of the distance at 10 km/hour
    4
    and the remaining distance at 12 km/hour. The distance between P and Q is
    1. 72 km
    2. 90 km
    3. 80 km
    4. 70 km
Correct Option: C

Time =
Distance
Speed

According to the question,
x
+
3x
= 7
1012

⇒ 
x
+
x
= 7
104

⇒ 
2x + 5x
= 7
20

⇒  7x = 7 × 20
∴  x =
7 × 20
= 20 km.
7

∴  PQ = 4x = 4 × 20 = 80 km.


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