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A Car Moves with a Speed of 40 Km/H for 15 Minutes and Then with a Speed of 60 Km/H for the Next 15 Minutes. the Total Distance Covered by the Car is - CBSE Class 7 - Science

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Question

A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:

  • 100 km

  • 25 km

  • 15 km

  • 10 km

Solution

25 km

Case I

Speed of the car = 40 km/h

Time taken = 15 min = 15/60 = 0.25 h

Speed = `"Distance Covered"/"Time Taken"`

Distance covered, d1 = Speed × Time taken = 40 × 0.25 = 10 km

Case II

Speed of the car = 60 km/h

Time taken = 15 min =  `15/60 = 0.25` h

Speed = `"Distnace covered"/"Time Taken"`

Distance covered, d2 = Speed × Time taken = 60 × 0.25 = 15 km

Total distance covered by the car, d1 + d2 = 10 + 15 = 25 km

Therefore, the total distance covered by the car is 25 km.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Science Textbook for Class 7 (2018 to Current)
Chapter 13: Motion and Time
Q: 10 | Page no. 157
Solution A Car Moves with a Speed of 40 Km/H for 15 Minutes and Then with a Speed of 60 Km/H for the Next 15 Minutes. the Total Distance Covered by the Car is Concept: Concept of Measuring Speed.
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