Question

Ana and Bella are sisters.They are responsible for keeping the

Answer 1

Answer:

Bella can complete work alone in 120 minutes

Step-by-step explanation:

Ana and Bella together can  complete the shoveling in 30 minutes.

They can do a part of work in 1 minute = $\frac{1}{30}$

Ana can do work alone in 40 minutes

She can do part of work in 1 minute = $\frac{1}{40}$

So, Bella can do a part of work in 1  minute =  $\frac{1}{30}-\frac{1}{40}$

                                                                        =  $\frac{1}{120}$

Bella can do $\frac{1}{120}$ part of work in 1  minute

Bella can do whole work in minutes = 120

Hence Bella can complete work alone in 120 minutes