Subject
Quantitative Aptitude
Topic
Areas & Volumes
A cistern of capacity 8000 litres measures externally 3 m by 6 m by 1 m and its walls are 5 cm thick. The thickness of the bottom is:
A cistern of capacity 8000 litres measures externally 3 m by 6 m by 1 m and its walls are 5 cm thick. The thickness of the bottom is:
ক)
90 cmখ)
1 dmগ)
1 mঘ)
1.1 cmExplanation
Let the thickness of the bottom be x cm. Then, [(330 - 10) x (260 - 10) x (110 - x)] = 8000 x 1000 => 320 x 250 x (110 - x) = 8000 x 1000 => (100 – x) = (8000 x 1000) / (320 x 250) = 100 => x = 10 cm = 1 dmRelated questions
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