Answer:

Step-by-step explanation:
Let's assume
radius of cylinder as 'r'
height of cylinder as 'h'
so, we have


r=15ft
h=10ft
now, we can use volume of cylinder formula

we can find derivative with respect to t

now, we can plug values

now, we can simplify it

Answer:
Rotha
Step-by-step explanation:
20 divided by 10 is 2
30 divided by 12 is 2.5
So Rotha is quicker
B
the surface area (SA ) is made up of 2 rectangles 2 by 6, 2 rectangles 2 by 5 and 2 rectangles 6 by 5
SA = 2( 2 × 6 ) + 2(2 × 5 ) + 2(6 × 5 )
= 24 + 20 + 60 = 104 m²
Answer:
its c
rectegylar prism
Step-by-step explanation:
hope I helped