An 8000-litre cistern with exterior dimensions of 3.3 m by 2.6 m by 1.1 m and 5 cm thick walls. The bottom is of the following thickness:
A. 90 cm
B. 1 dm
C. 1 m
D. 1.1 cm
Answer:B
An 8000-litre cistern with exterior dimensions of 3.3 m by 2.6 m by 1.1 m and 5 cm thick walls. The bottom is of the following thickness:
A. 90 cm B. 1 dm C. 1 m D. 1.1 cm
Explanation: Allow for a thickness of x cm at the bottom.Then [(330 - 10) x (260 - 10) x (110 - x)] becomes [(330 - 10) x (260 - 10) x (110 - x)]. = 8000 x 1000 = 320 x 250 x (110 - x)=1 dm = x = 10 cm.