Qr

Started by future_dentist
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future_dentist

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A software can complete 5000 piece order in 4days. Another software can complete the same order in 5 days. How long would it take them to do together...

A 2days
B 3days
C 3 1/2 days
D 4 days
E 4 1/2 days

Ans: B
 
1/4 + 1/5 = 9/20 = 1/T

T= 20/9, or 2.22 days.
The next highest answer is 3 days, B. Thats ****ty though, should have 2.2 as an answer IMO :/
 
yea,

well 2.2 days is actually three days! 😀

5000/4 = 1250 per day

5000/5 = 1000 per day

therefore in one day 2250 can be produced. 5000/2250 = 2.2