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Amanda [17]
3 years ago
10

Hi! Can someone please help me?

Mathematics
1 answer:
Brrunno [24]3 years ago
8 0

Answer:

30 hrs

Step-by-step explanation:

In 1 hour, J completes 1/55 of job

In that time, D completes 1/66 of job

J + D together complete 1/55 + 1/66 of the job in 1 hour

1/55 + 1/66 = 1/30

Together, it takes them 30 hours to build the wall.

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