We are given with the following given
dV/dt = 35 m3/min
h = (3/2)D
What is asked is
dr/dt at t = 7 min
The volume of a cone is
V = (1/3)πr²h
From the given
h = (3/2)D
since D = 2r
h = 3r
Subsituting
V = πr³
At t = 7 min, the volume is
V = 35(7)
V = 245
and the radius is
245 = πr³
r = 4.27
Differentiating the volume
dV/dt = 3πr² dr/dt
From the given
dV/dt = 35
Subsituting
35 = 3πr² dr/dt
So,
dr/dt = 0.20 m/s
and
dh/dt = 0.60 m/s
Answer:
1. 36
2. 8.5
3. 2 i think
4. 6
5. 9
6. -3.6
Step-by-step explanation:
Answer:
21
Step-by-step explanation:
960 watt-hpd
5 x 60/6 = 50
50 x 960 = 48,000
Answer is: -->> 48,000
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