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8th Class Mathematics Comparing Quantities Question Bank Commercial Mathematics

  • question_answer
    Read the following statements carefully and choose the correct option. (i): On the average, John uses 12.5 litres of petrol a day, then in 2 weeks he uses 180 litres of petrol. (ii): A motorist travelled 204 km in 4 hours, then his average speed is 51 km/hr.

    A) is true only

    B) (ii) is true only

    C) Both (i) and (ii) are true

    D) Neither (i) nor (ii) is true

    Correct Answer: B

    Solution :

    A: John used 12.2 litres of petrol in day.  John used \[(12.5\times 14)\] litres of petrol In 2 weeks (or 14 days) = 175 litres B: Total distance travelled = 204 km time = 4 hours Average speed \[=\frac{\text{total}\,\text{distance}}{\text{time}}\] \[=\frac{204}{4}=51\,\,km/hr,\]


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