Eight diggers will do the job in 85 hours. After 21 hours, three diggers had to leave. How many hours will the work be done?

Correct answer:

t =  123.4 h

Step-by-step explanation:

8·85 = 21·8 + (t-21)·(8-3)

5t = 617

t = 617/5 = 123.4

t = 617/5 = 123.4

Our simple equation calculator calculates it.

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?
Do you want to convert time units like minutes to seconds?

You need to know the following knowledge to solve this word math problem:

Units of physical quantities:

Themes, topics:

Grade of the word problem:

Related math problems and questions: