A water pump takes 70 minutes to fill a tank. A larger pump can fill the same tank in 30 minutes.
How long will it take to fill the tank if both pumps are used?

A. 15 minutes
B. 21 minutes
C. 40 minutes
D. 50 minutes

21 minutes Option B

Step-by-step explanation:

1 min

Small --> 1/70

Big --> 1/30

Together --> 1/70 + 1/30 = 3/210 + 7/210 = 10/210 = 1/21

1 divided by 1/21 = 21

Thus, it's 21 minutes (B)

answer is d-29

step-by-step explanation:

since you didn't include the picture, i can give you the description so you know how to pick the correct answer. the third quartile of a data is always shown in a box plot. in the middle of your graph should be a box. the third quartile is the value that goes with the far right edge of the box.

it could be 1,3 and more others to create a cylinder.

step-by-step explanation: