Multiple choice

Find the value of both quantities and state the correct relationship. Quantity I: speed of swimmer in still water, if he can swim downstream at 14 km/hr and upstream at 6 km/hr. Quantity II: speed of swimmer in still water, if he swims a distance of 36 km downstream in 6 hours and a distance of 40 km upstream in 8 hours.

  1. Quantity I > Quantity II

  2. Quantity I ≥ Quantity II

  3. Quantity II > Quantity I

  4. Quantity II ≥ Quantity I

  5. Quantity I = Quantity II or Relation cannot be established
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Quantity I: If downstream speed is 14 km/hr and upstream speed is 6 km/hr, then speed of swimmer in still water = (downstream + upstream)/2 = (14 + 6)/2 = 10 km/hr. Quantity II: Downstream distance 36 km in 6 hours gives downstream speed = 6 km/hr. Upstream distance 40 km in 8 hours gives upstream speed = 5 km/hr. Speed in still water = (6 + 5)/2 = 5.5 km/hr. Comparing: 10 > 5.5, so Quantity I > Quantity II.

Keep practicing — related questions