It takes 18 electricians 35 days to wire a new housing subdivision. How many days would 28 electricians require to do the same job?
one electrician would take
18 * 35 = 630 days
so
28 electricians would take
630/28 = 22.5 days
Here is the simple way:
First divide 35 by 28 which is 1.25.
Then, multiply 1.25 and 18 together.
22.5 is your answer.
@ Ms. Sue, you simply cannot cross multiply because it is an inverse proportion, rather it would be 630 (total days) divided by total workers (28) equaling 22.5 days. @Damon, you are right!
22.5 days
dis is inverse proportion: let w be no of days,find constant k : 18=K/35,K=630, 28=630/w,find your w
thanks for the work
22.5
I got 54.(4)
but my teacher says its wrong
Sorry. My brain took a brief break. This is not a viable proportion.
I got 14
and it wrong