Two persons work together at the local aquarium. It takes the first person 120 minutes to clean the jellyfish tanks. Since the second person is new to the job, it takes him longer to perform the same task. When working together, they can perform the task in 70 minutes. How long does it take the second person to do the task by himself?

168 minutes

Step-by-step explanation:

It takes 120 minutes for the first person to clean the jellyfish tank.

This means that in 1 minute the first person cleans of the tank.

Let the time taken by the second person working alone to clean the tank be x minutes.

Then in 1 minute the second person cleans of the tank.

Working together, the two persons clean,

of the tank

But it is given that the two persons working together can clean the tank in 70 minutes. This means that in 1 minute both of them can clean of the tank.

Expressing in equation form:

This means that the second person can clean the tank in 168 minutes.

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

b

step-by-step explanation:

it have 5 sides and 5 identicle angle.the rest does not have the same property as b.

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