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TCS NQT GuideTCS NQT Numerical AbilityTime, Speed, and Distance: Trains and Boats Concepts

Time, Speed, and Distance: Trains and Boats Concepts

Learn core concepts, essential formulas, and attempt practice questions designed on the latest TCS NQT testing patterns.

Key Concepts & Formulas

  • 1Speed = Distance / Time.
  • 2Convert km/h to m/s: Multiply by 5/18.
  • 3Convert m/s to km/h: Multiply by 18/5.
  • 4Relative speed: Same direction = S1 - S2. Opposite direction = S1 + S2.
  • 5Downstream Speed = Speed of Boat + Speed of Stream. Upstream = Boat - Stream.

TCS NQT Style Practice Questions

Practice Question 1

A train 150 m long crosses a pole in 9 seconds. Find the speed of the train in km/h.

A) 60 km/h
B) 54 km/h
C) 45 km/h
D) 72 km/h

Correct Answer: A) 60 km/h

Step-by-step Solution: Speed = Distance / Time = 150 / 9 m/s. Convert to km/h: (150 / 9) * (18 / 5) = 30 * 2 = 60 km/h.

Practice Question 2

A boat travels 12 km/h downstream and 8 km/h upstream. Find the speed of the stream.

A) 2 km/h
B) 10 km/h
C) 4 km/h
D) 1.5 km/h

Correct Answer: A) 2 km/h

Step-by-step Solution: Speed of stream = (Downstream - Upstream) / 2 = (12 - 8) / 2 = 2 km/h.

Study Pro-Tip

Convert units immediately. A mix of meters and km/h is the most common cause of calculation errors.

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