Question

NEED HELP ASAP.

Two robots can do a task in 5 min, working together. The first robot, working alone, can fo the task in 15 min. How many minutes will the second robot, working alone, to do the task?

Answer 1

Answer: 10 minutes

Step-by-step explanation:

Answer 2

The second robot working alone would spend 7.5 minutes to do the task.

Equation

Equation is used to show the relationship between two or more numbers and variables.

Let y represent the rate at which the first robot work and x represent the rate that the second robot work.

Two robots can do a task in 5 min, working together. Hence:

• (1/x + 1/y)5 = 1  (1)

The first robot, working alone, can for the task in 15 min. hence y = 15 min.

(1/x + 1/15)5 = 1

5/x + 1/3 = 1

x = 7.5 minutes

The second robot working alone would spend 7.5 minutes to do the task.

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