13. LM = 2KL

    x + 3y = 2 (3x - y )

    x + 3y = 6x - 2y

    5y = 5x

    x = y

    Ans : A

14. x + 2y = 4.5 - (I)

    4x + 3y = 8.0 - (II)

    Multiply equation (I) by 4

     

    4x + 8y = 18 - (III)

     

    Solving (II) & (III)

    5y = + 10

    y = 2

    Ans : E

15. Cost of binding all books = Daily hiring charges +     binding cost of one book ´ number of books.

    =     h +

     

    Ans : D

16. h + 30 = 40 + 35 (Sum of the angles of a triangle is 180)

    [Note: the vertically opposite angles which are common are left out in the calculation.]

    h = 75 - 30

    h = 45

    Ans : B

    

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Index

Test 3

Test 4