Answer:
89.51%
Step-by-step explanation:
Assuming given units are in cm
Tge rate of filling the cup is 70/2= 35 cm3/s
Volume of the cup is [tex]\pi r^{2}\frac {h}{3}[/tex] and replacing r with 4 cm and h with 7 cm then the volume is equivalent to
[tex]\pi*4^{2}*\frac {7}{3}= 117.3 cm^{3}[/tex]
Volume filled after 3 seconds will be 3*35=105 cm3
Percentage filled is [tex]\frac {105}{117.3}\times 100\approx 89.51[/tex]
