Question 1160279
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Depth of container: 25cm<br>
Depth of water in container originally: (4/5) of 25cm = 20cm<br>
Depth of water after some was removed: 20-5 = 15cm<br>
Volume of water remaining: 60*40*15 = 36000 cm^3<br>
Capacity of tank: (3/4) of 36000 cm^3 = 27000 cm^3 (because the capacities of the tank and basin are in the ratio 3:1)<br>
Height of tank (volume of tank, divided by cross-sectional area of the tank): 27000/(18*15) = 27000/270 = 100<br>
ANSWER: the height of the water in the tank = the height of the tank = 100cm.<br>