A cube of edge 15 cm is immersed completely in a rectangular vessel containing water . If the dimensions of the base of vessel are 20 cm x 15 cm, find the rise in water level
A) 11.25cm
B) 11.56cm
C) 11.66cm
D) 10.86cm
Answer: A) 11.25cm
Explanation:
Increase in volume = Volume of the cube = (15 x 15 x 15) cm3.
\Rise in water level = volume/area = (15 x 15 x 15)/(20 x 15) cm = 11.25 cm.
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By increasing the price of entry ticket to a fair in the ratio 5:7, the number of visitors to the fair has decreased in the ratio 11:9. In what ratio has the total collection increased or decreased?