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maddy6882
21.07.2021 •
Mathematics
A cylindrical water tank has a height of 20cm and a radius of 14cm. If it is filled to 2/5 of its capacity, calculate.
I. Quantity of water in the tank
II. Quantity of water left to fill the tank to its capacity.
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Ответ:
Step-by-step explanation:
the volume of a cylinder is simply ground area times height.
the area of a circle is pi×r²
so, in total we have pi×r²×h
r = 14
h = 20
so, the total capacity is
Ct = pi × 14² × 20 = pi × 196 × 20 = pi × 3920 =
= 12315 cm³ = 12315 ml = 12.315 liters
I.
only 2/5 of the total capacity is filled.
so, the filled capacity is
Cf = 12315 × 2 / 5 = 2463 × 2 = 4926 ml = 4.926 liters
II.
it is the remainder to the total.
so, the empty capacity that can still be filled is
Ce = 12315 - 4926 = 7389 ml = 7.389 liters
Ответ:
2+2 = 4 anyone can do that lol
Step-by-step explanation: