Question 06: A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:

(a) 90 cm

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(b) 1 dm

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(d) 1.1 cm

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Solution

The correct option is B
(b) 1 dm

Answer 06. (b)
Explanation:
Let the thickness of the bottom be x cm.
Then, [(330 - 10) * (260 - 10) * (110 - x)] = 8000 * 1000
320 * 250 * (110 - x) = 8000 * 1000
(110 - x) = 8000/320 * 1000/250 = 100
x = 10 cm = 1 dm.

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Question 06: A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:

The correct option is B (b) 1 dm Answer 06. (b) Explanation: Let the thickness of the bottom be x cm. Then, [(330 - 10) * (260 - 10) * (110 - x)] = 8000 * 1000 320 * 250 * (110 - x) = 8000 * 1000 (110 - x) = 8000/320 * 1000/250 = 100 x = 10 cm = 1 dm.

The correct option is B
(b) 1 dm

Answer 06. (b)
Explanation:
Let the thickness of the bottom be x cm.
Then, [(330 - 10) * (260 - 10) * (110 - x)] = 8000 * 1000
320 * 250 * (110 - x) = 8000 * 1000
(110 - x) = 8000/320 * 1000/250 = 100
x = 10 cm = 1 dm.