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7th Class Science Sample Paper Science Sample Paper - 9

  • question_answer
    (i) Define speed.
    (ii) The distance between Delhi and Agra is 270 km. A train takes 3 hours to cover the distance. Calculate the speed of train.
    (iii) Show the shape of distance-time graph for a vehicle moving with a constant speed

    Answer:

    (i) The total distance covered in a unit time is known as speed.                                                                      
    (ii) Distance between Delhi and Agra = 270 km
    Time taken by Train = 3 hours
    Speed = Distance/Time
    =270/3 = 90 km/hr.
    (iii) Distance ? Time graph                                                                                                                     
    Distance ? Time graph


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