Page 2 - CL-8 CH- 1( CBQ)
P. 2

8         A batch of bottles was packed in 25 boxes, with 12 bottles in each box. If the same batch
                  is packed using 20 bottles in each box, the number of boxes would be filled is—————-

        9         A school has 8 periods a day, each of 45 minutes duration. How long would each period

                  be, if the school has 9 periods a day, assuming the number of school hours to be the
                  same?.

        10        A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill
                  in five hours?

        11         A train is moving at a uniform speed of 75 km/hour.

                  (i) How far will it travel in 20 minutes?
                   (ii) Find the time required to cover a distance of 250 km.
        12        Assertion ( A ): The height and weight of individuals are in direct proportion.

                  Reason( R ): Height to weight ratio varies from one individual to another.
                  a)both Assertion and Reason are correct and Reason is the correct explanation of

                  Assertion.
                  (b) both Assertion and Reason are correct, but Reason is not the correct explanation of
                  Assertion.
                  (c) Assertion is correct but Reason is incorrect.
                  (d) Assertion is incorrect but Reason is correct.

        13        Assertion: If 25 persons can finish a job in 10 days then 5 persons will finish it in 2 days.

                  Reason (R): More persons, lesser is the time taken to do the job.

                      a)  both Assertion and Reason are correct and Reason is the correct explanation of
                         Assertion.
                         (b) both Assertion and Reason are correct, but Reason is not the correct
                         explanation of Assertion.
                         (c) Assertion is correct but Reason is incorrect.
                         (d) Assertion is incorrect but Reason is correct.


        14        One day Maths teacher explaining about Direct and Inverse proportion with the help of
                  many examples. He has given the example of relation between the length of shadow and
                  height of the water tank and height. A water tank casts a shadow 21 m long. A tree of
                  height 9.6 m casts a shadow 8 m long at the same time. Answer the following questions
                  based on the above information:


                          (a) Find the height of the water tank in the above situation.

                          (b) A water tank casts a shadow 27 m long. A tree of height 10.5 m casts a
                          shadow 9 m long at the same time. The lengths of the shadows are directly
                          proportional to their heights. Find the height of the tank.



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