The fire tank has a cuboid shape with a rectangular floor measuring 13.7 m × 9.8 m. Water depth is 2.4 m. Water was pumped from the tank into barrels with a capacity of 2.7 hl.

How many barrels were used if the water level in the tank fallen 5 cm? Write the amount of water pumped as a percentage.

Correct result:

n =  25
p =  2.08 %


V= m3 V1= m3 V2=2.7 hl=0.27 m3  n=V1V225
p=V1V100=6.713322.224100=2.08%p = \dfrac{ V_1}{ V } \cdot 100 = \dfrac{ 6.713}{ 322.224 } \cdot 100 = 2.08 \%

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