A cylindrical dispenser of capacity 5.8 ℓ was filled with persimmon juice to its brim. The persimmon juice in the dispenser was then dispensed into a cubical container of sides 18 cm, through a tap flowing at a rate of 222 mℓ /min. After 16 min, the tap was turned off and the container was
23 full.
- What percentage of the persimmon juice in the cylindrical dispenser was left? Round off your answer to the nearest 2 decimal places.
- How many litres of persimmon juice were there in the container at first? (1 ℓ = 1000 cm3)
(a)
Volume of persimmon juice that was dispensed
= 222 x 16
= 3552 mℓ
1 ℓ = 1000 mℓ
3.552 ℓ = 3552 mℓ
Volume of persimmon juice Left in the dispenser
= 5.8 - 3.552
= 2.248 ℓ
Percentage of persimmon juice Left in the dispenser
= 2.248 ÷ 5.8 x 100
= 38.758620689655%
≈ 38.76% (to 2 decimal places)
(b)
Amount of persimmon juice in the container in the end
= 23 x 18 x 18 x 18 = 3888 cm
3
Amount of persimmon juice in the container at first
= 3888 - 3552
= 336 cm
3 1000 cm³ = 1 ℓ
336 cm
3 = 0.336 ℓ
Answer(s): (a) 38.76%; (b) 0.336 ℓ