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  1. A
    `120 litres`

    B
    ``1200 litres`

    C
    `12000 litres`

    D
    `120000 litres`

    Explanation: Not available 

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  2. A
    `56 kg`

    B
    `48 kg`

    C
    `36 kg`

    D
    `27 kg`

    Explanation: Volume `= (9 xx 40/100 xx 20/100) cu.m` `= 18/25 cu.m`. :. Wight` = (18/25 xx 50) kg` `= 36 kg`. 

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  3. A
    `30 m`

    B
    `15√2 m`

    C
    `30√2 m`

    D
    `60 m`

    Explanation: Length of longest rod = Length of diagonal `= √1^2 + b^2 + h^2` `= √(30)^2 + (24)^2 + (18)^2` `= √1800` `= 30√2 m`. 

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  4. A
    `40000`

    B
    `20000`

    C
    `50000`

    D
    `45000`

    Explanation: Volume of wall `= (2400 xx 800 xx 60) cu. cm`. Volume of wall (apart from mortar) `= (/100 xx 2400 xx 800 xx 60) cu.m`. Volume of `1` bricks `= (24 xx 12 xx 8) cu. cm.` :. Number of bricks required `= (90/10 xx 2400 xx 800 xx 60 xx 1/(24 xx 12 xx 8)` `= 45000`. 

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  5. A
    `6`

    B
    `11`

    C
    `33`

    D
    `40`

    Explanation: Volume of block `= (6 xx 12 xx 15) cu. cm` `= 1080 cu. cm`. The side of largest cube = H.C.F.of `6 cm, 12 cm, 15 cm = 3 cm`. Volume of this cube `= (3 xx 3 xx 3) cm^3 = 27 cm^3` Number of cubes `= (1080/27)` `= 40`. 

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  6. A
    `12 m`

    B
    `16 m`

    C
    `32 m`

    D
    `20 m`

    Explanation: Suppose height = x metres . Then, breadth = 2x metres and length = 4x metres. `:. x xx 2x xx 4x = 512` `or x^3 = 64` `or x = 4`. `:. Length = 4x = 16 m. 

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1 of 12 pages