Answer:
Option B, 8/5 hr
Step-by-step explanation:
1/2 + 1/8
1*4 / 2*4 + 1/8
4/8 + 1/8
5/8 = 1/t
5t / 5 = 8 / 5
t = 8/5
Answer: Option B, 8/5 hr
Answer: B 8/5 hr
Step-by-step explanation:
One maid can clean the house in 2 hours. This means that the rate at which she cleans the house per hour is 1/2
Another maid can do the job in 8 hours. This means that the rate at which the other maid cleans the house per hour is 1/8
If they work together, they would work simultaneously and their individual rates are additive. This means that their combined working rate would be
1/2 + 1/8 = 5/8
Assuming it takes t hours for both of them to clean the room working together, the working rate per hour would be 1/t. Therefore,
5/8 = 1/t
t = 8/5 hour
