Answer: It wold take Emma 1/3 of a minute or 20 seconds to drink the entire milk shake.
Step-by-step explanation: Assuming Emma doesn't take any breaks and drinks the entire milk shake at the same rate as she drank the first 1/4, the ratio for solving this problem is:
1 /12 /1/4=t/1 or t =4 /12 or t =1/3