Help plz i need sum quicc mathz

the answer is 1,055.04 ft^3

Step-by-step explanation:

you take 7 multiply it by 3.14 and multiply it by 4^2 the multiply the total by three.

A

Step-by-step explanation:

volume= πr²h.

3.14 x 4² x 7

3.14 x 16 x 7

= 351.68ft³

Since vol for each= 351.68, then for the 3 barrels it will be 351.68 x3

=1055.04ft³

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m