A ladder which is 6.7 m long is placed on the ground 2.8 m from a vertical wall and then leaned over to the wall. How high up th
1 answer:
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Answer:
3 days
Step-by-step explanation:
Let the amount of work be x.
Daniel:
10 days = x
1 day = x
Father:
6 days = x
1 day = x
Together:
1 day = x +
x
= x +
x
= x
= x
No. of days = x ÷
x
= x ×
x
=
= 3