C 3*3 = 9 6*6=36 and 36 plus 9 is 45 and 9*9 = 81 so it’s not equal and not right.
The answer is C hope this helped:)
Answer:
Length 3 cm.
Width 3 cm.
height 9. cm
Step-by-step explanation:
The volume is the length * width * height = LWH.
81 = 3* 3 * 9 so L could be 3, W could be 3 and H could b 9 cm.
There is a formula for this
Time = [Worker 1 * Worker 2] / [Worker 1 + Worker 2]
Time = 30*40 / (30+40)
Time = 1,200 / 70
Time =
<span>
<span>
<span>
17.1428571429
</span>
</span>
</span>
minutes
Alternate method
In 1 minute, Mark can clean (1/30) of a room
In 1 minute, Lynn can clean (1/40) of a room
Together, they can clean (1/30 + 1/40) = (7 / 120) of a room in 1 minute.
Together, they can clean one room in (120 / 7) minutes.
(120 / 7) =
<span>
<span>
<span>
17.1428571429
</span>
</span>
</span>
minutes.
Source:
http://www.1728.org/work.htm
