Question

a field is 150 m long and 100m wide. A plot (outside the field) 50m long and 30 m wide is dug to the depth of 8 m and the earth taken out from the plot is spread evenly in the field. By how much is the level of the field raised

Answer 1

Answer:

80 cm

Step-by-step explanation:

volume of earth dug =50×30×8=12000 m3

volume spread =12000 m3

height of spread= volume/area=12000/(150×100)

=0.8m=80cm

Answer 2

Answer:

8cm

Step-by-step explanation:

Area of field = 150×100 =15000

Volume of plot =50×30×8=12000

A/q,

Volume = l×b×h

12000 = 50×30×h

h=12000/1500

h = 8 cm