Two printing presses working together can complete a job in 2.5 hours. Working alone, press A can do the job in 10 hours. How many hours will press B take to do the job by itself?
A. 10/3
B. 4
C. 5
C. 25/4
E. 15/12
. Multiply each term by 10x: 2.5x + 25 = 10x .Subtract 2.4x from each other: 25 = 7.5x . Divide each side by 7.5: x = 3 hours. The answer is A.
Which of these is a domestic animal.
Answer A
We keep food in the ____________ to prevent spoilage.
Answer C
Scientists perform Experiments in the ________.
Which of these seasons of the year is not present in Nigeria?
Answer D
