8th Class Mathematics Sample Paper Mathematics Sample Paper - 4

  • question_answer
    160 \[{{m}^{3}}\]of water is to be used to irrigate a rectangular field whose area is 800\[{{m}^{2}}\]. What will be the height of the water level in the field?

    Answer:

    Volume of water s= 160 m3
    Area of rectangular field = 800 m2
    Let h be the height of water level in the field.
    Now,              volume of water = volume of cuboid formed on the field by water.
    160 = Area of base \[\times \] height
    = 800 \[\times \] h
    \[h=\frac{160}{800}=0.2\]    So,   required height = 0.2 m.


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