The time that it will take a group of 4 workers to do the same job, if each worker performs at the same rate is D. 15.
What is an expression?
It should be noted that an expression simply illustrates the relationship between the variables that are given.
In this case, the group of 3 workers needs 20 days to do a certain job. Let the time taken for the 4 workers be x. This will bee illustrated as:
3/4 = x/20
Cross multiply.
4x = 3 × 20
4x = 60
Divide
x = 60 / 4
x = 15
They will use 15 days to to the job.
Learn more about expressions on:
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