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The length of a cuboidal tank is 20 metres. The height of the water- level in the tank decreases by 15 cm when 18 kilolitres water is taken out from t

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The length of a cuboidal tank is 20 metres. The height of the water- level in the tank decreases by 15 cm when 18 kilolitres water is taken out from the tank. Then find the breadth of the tank.
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18 kilolitres = 18 cubic- metres.
The height of water -level in the tank decreases by 15 cm = 0.15 metre.
Let the bredth of the tank be x metres,
`:. 20 xx x xx 0.15 = 18 or, x = 18/(20 xx 0.15)= 6`
Hence the breadth of the tank = 6 metres.
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