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    Question

    A field is 125m long and 15m wide. A tank 10m ×7.5m×6m

    was dug in it and the earth thus dug out was spread equally on the remaining field. The level of the field thus raised is equal to which one of the following
    A 28cm Correct Answer Incorrect Answer
    B 56cm Correct Answer Incorrect Answer
    C 25cm Correct Answer Incorrect Answer
    D 60cm Correct Answer Incorrect Answer

    Solution

    Remaining field = Area of field -Area of tank =125×15 -10×7.5 =1875-75 = 1800 Volume of earth dug =10×7.5×6 =450cubic m By given condition – 1800×h = 450 h=450/1800=1/4m h =25cm

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