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endermss1970
26.06.2019 •
Mathematics
Running at their respective constant rates, machine x takes 2 days longer to produce w widgets than machine y. at these rates, if the two machines together produce 54 w widgets in 3 days, how many days would it take machine x alone to produce 2w widgets? a4 b6 c8 d10 e12
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Ответ:
Step-by-step explanation:
Work done= rate *time
let time taken by X to produce w widgets be t days
rate = w/t
Since X take 2 days longer rate for Y would be
rate= w/t-2
combined rate is (w/t+w/t-2)
Since in 3 days both x and y can produce 5w/4
(w/t+w/t-2)= 5w/4
5t2 -34t +24=0
(t-6)(t-4/5)=0
t=6 or t=4/5(not possible because t-2(time taken by Y) comes out to be -6/5 which is not possible)
so t=6 days which is the time taken by X to produce w widgets
so time taken to produce 2w widgets will be 12 days.
Ответ:
I was only able to answer 3 but I do hope this helped. B
Step-by-step explanation:
(4×10^3)×(12×10^5)
Remove the parentheses
4×10^3×12×10^5
Calculate the product
4.8×10^9
I hope this helped?