If the dimensions of a cylinder are doubled, the surface area will . a. double
b. stay the same
c. quadruple

a. double

Step-by-step explanation:

option a is correct answer

a. double

Step-by-step explanation:

if you use photomath right away it will give you the answer not like this app that you have to wait for people.

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