Discussion Forum

A feild is 200m long and 150m broad.There is aplot, 50m long and 40m broad, near the feild.The plot is dug 7m deep and the earth taken out is spread evenly on the feild.By how many metres is the level of the filed raised?

Answer:

Explanation:

Area of the field $= 200\times 150=30,000 m^{2}$

Volume of the earth dug out from the plot$=50\times 40\times 7=14000m^{3}$

Let the level of the feild raised by x m

$\therefore , 30,000x=14000 \Rightarrow x=\frac{14000}{30000}=0.47 m$