Question

Barb can shovel the snow from her sidewalk in 40 minutes. Bonnie can do it in 60
minutes. If they work together they can save some time. How long would it take
them to shovel the sidewalk together?

Answer 1

Answer:

20 minutes.

Step-by-step explanation: Take away Barb's time from Bonnie's time and that = 20 minutes. hope this helps.

Answer 2

Answer:

total time 24 minute

Step-by-step explanation:

think,whole work is x

b takes 40 min to do x work

1 mint to do x/40

c takes 60 mint to do x

1 mint to do x/60

so both of them do (x/40)+(x÷60)=x/24 in 1 mint

so to do full x work in 24 min