Garden pond

Concrete garden pond has bottom shape of a semicircle with a diameter 1.7 m and is 79 cm deep. Daddy wants make it surface. How many liters of water is in pond if watel level is 28 cm?

Correct result:

V =  317.77 l

Solution:

$V = \dfrac12 \pi r^2 h = \dfrac12 \pi (D/2)^2 h \ \\ V= \dfrac12 \pi (1.7/2\cdot 10)^2 \cdot (28/10) = 317.77 \ \text{l}$

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