Two diggers

There are two diggers. One digger digs a pit 77 hours second, digging 1.2 times faster.

a) how long took to dig a pit second digger
b) how long took it to dig together

Correct answer:

b =  64.17 h
s =  35 h

Step-by-step explanation:

a=77 h b=a/1.2=77/1.2=64.17 h
s (1/a+1/b)=1 s (1/77+1/64.166666666667)=1  2.2s=77  s=2.277=35  s=35=35 h



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







Tips for related online calculators
Looking for calculator of harmonic mean?
Looking for a statistical calculator?
Do you have a linear equation or system of equations and 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:

Related math problems and questions: