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MA_775_DIABLO [31]
3 years ago
6

The volume of a spherical balloon is increasing at the rate of 25cm^3/min, how fast is the radius increasing when the radius is

equal to 20cm?
Mathematics
1 answer:
Afina-wow [57]3 years ago
5 0

Answer:

V=4/3πr^3;S=4πr^10;dV/dt=dV/dr×dr/dt=4πr^10×dr/dt;dS/dt=dS/dr×dr/dt=8πr×dr/dt=2/r×dV/dt;当r=10cm时,dS/dt=50cm^2/s

Step-by-step explanation:

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Mariulka [41]

Answer:

2 5/12

Step-by-step explanation:

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3 years ago
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A tire on a toy car has a diameter of 8 cm if the toy car travels 12,560 cm approximately how many times does the tire rotate? U
Marina86 [1]

Answer:

The number of rotations completed by tire  = 500.

Step-by-step explanation:

The diameter of the tire of toy car = 8 cm

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Now, Circumference of the Circle = 2πr

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Now, \textrm{Total  number of rotations}  = \frac{\textrm{Total Area covered}}{\textrm{Area covered in 1 rotation}}

= \frac{12,560}{25.12}  = 500

The number of rotations completed by circle = 500.

6 0
3 years ago
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Vilka [71]

Answer:

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Step-by-step explanation:

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