Carol H. answered • 09/13/18

Tutor

4.9
(285)
Masters' Degree in Mathematics with 35 Years of Teaching Experience

**Let t = the time it will take them if they dig together**

**(time together)/(time alone) + (time together)/(time alone) + (time together)/(time alone) = 1**

**t/3 + t/5 + t/6 = 1 Multiply the entire equation by the LCD, which is 30.**

**10t + 6t + 5t = 30**

**21t = 30**

**t = 1.43 days, rounded to the nearest hundredth**