# Tanks

Fire tank has 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 percentage.

Correct result:

n =  25
p =  2.08 %

#### Solution:

$V = 13.7 \cdot 9.8 \cdot 2.4 = 322.224 \ m^3 \ \\ V_1 = 13.7 \cdot 9.8 \cdot 0.05 = 6.713 \ m^3 \ \\ V_2 = 2.7 \ hl = 0.27 \ m^3 \ \\ \ \\ n = \dfrac{ V_1}{V_2} \doteq 25$
$p = \dfrac{ V_1}{ V } \cdot 100 = \dfrac{ 6.713}{ 322.224 } \cdot 100 = 2.08 \%$ Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

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