Respuesta :
Answer:
Susan worked for 10 mins
Step-by-step explanation:
because twice as fast 20 mins and 10 plus equal 30 I MIGHT BE WRONG
Answer:
susan spent 20 minutes alejandro spent 10
Step-by-step explanation:
S=A x2
30 divided by 3 is 10
susan gets 2/3 becasuse she worked 2 as fast alejandro gets 1/3