Question

How many hours are required by A and B to finish the creation of 110 documents if they are working together?
Given that:

A needs 6 hrs to make 32 documents.

B needs 5 hrs to make 40 documents.

Answer 1

see the pic
I hope it's not wrong and helps you

Answer 2

A takes 6 hours to make 32 documents

⇒ 32/6 documents in 1 hour

⇒ 16/3 documents in 1 hour

.

B takes 5 hours to make 40 documents

⇒ 40/5 documents in 1 hour

⇒ 8 documents in 1 hour

.

If A and B works together:

In 1 hour: 16/3 + 8 = 40/3 documents in 1 hour

.

Find time needed to create the 110 documents:

hours needed =110 ÷ 40/3 = 8.25 hours

.

8.25 hours = 8 hours 15 mins

.

Answer: They need 8 hours 15 mins to create 110 documents.