Answer:
30 minutes
Explanation:
Given:
Max can mow a lawn in 45 minutes
Max mows in 45mins= 1 lawn
Max mows in 1 min= 1//45 lawn
Jan takes twice as long to mow the same lawn
Jan mows in 2(45mins)= 1 lawn
Jan mows in 1 min= 1//90 lawn
Now finding how long will it take,t , them to mow the lawn
1/t= 1/45 + 1/90
1/t= (2+1)/90
1/t= 3/90
t= 90/3
t = 30
If they work together, they will take 30 minutes to mow the lawn !