50 pairs of whole numbers
Answer:
A. 0
Step-by-step explanation:
Answer:
mabye the reflixive prop
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given
It takes 20 min and 30 min for a person and his friend to paint a wall individually i.e.
In 1 min they cover
part and
part of wall respectively.
If the work together, 1 minute work is

Time required will be reciprocal of it
