Rectangular 67604

The Horniakovs dug a pit for a cesspool in the shape of a cuboid with bottom dimensions of 40*40 dm and a depth of 350 cm.
A) How many cubic meters of soil did they dig up?
B) The excavated soil was evenly spread and pressed onto a rectangular area measuring 20*8m. How many centimeters is the height of the resulting layer?

Correct answer:

V =  56 m3
d =  35 cm

Step-by-step explanation:

a=40 dm m=40:10  m=4 m b=40 dm m=40:10  m=4 m c=350 cm m=350:100  m=3.5 m  V=a b c=4 4 3.5=56 m3
x=20 m y=8 m  S=x y=20 8=160 m2 V = S d1  d1=V/S=56/160=207=0.35 m  d=d1 cm=d1 100  cm=0.35 100  cm=35 cm=35 cm

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