Question 17 of 17beginner🔧 ApplyNumerical2 marks

A car takes 2 hours to reach a destination, travelling at a speed of 60 km/h. How long will the car take if it travels at a speed of 80 km/h?

Correct Answer

Given: Speed = 60 km/h, Time = 2 hours, New Speed = 80 km/h.

Formula: Distance = Speed × Time Substitution: Distance = 60×260 \times 2 Calculation: Distance = 120 km

Formula: Time = Distance ÷ Speed Substitution: Time = 120 ÷ 80 Calculation: Time = 1.5 hours

Answer: The car will take 1.5 hours (or 1 hour 30 minutes).

Exercise: Figure it Out (Section 4) | Q: 12 | (Page Page 15)
For More Understanding

Explanation

The chapter explains inverse proportion between speed and time. Distance = Speed × Time = constant. Distance = 60×260 \times 2 = 120 km. New time = 120 ÷ 80 = 1.5 hours.

Solution Steps

  1. Identify given values: Speed = 60 km/h, Time = 2 hours, New Speed = 80 km/h.

  2. Calculate distance: Distance = Speed × Time = 60×260 \times 2 = 120 km.

  3. Calculate new time: Time = Distance ÷ New Speed = 120 ÷ 80 = 1.5 hours.

  4. Convert time: 1.5 hours = 1 hour 30 minutes.

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