3harvesting machines that work in equal efficiencies take 2 hours to harvest one half of a paddy field when used together. what is the number of hours it takes when 4 such machines arw used together to harvest the whole paddy field. answer.

To figure this out, you need to find unit rate. Divide three by two to get the answer of 1.5, then you need to multiply 1.5 by four. The answer is six hours. I hope this helps! :)

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's