meganstranh meganstranh
  • 08-02-2018
  • Mathematics
contestada

The minute hand of a certain clock is 4 in long. Starting from the moment when the hand is pointing straight up, how fast is the area of the sector that is swept out by the hand increasing at any instant during the next revolution of the hand?

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STSN8117
STSN8117 STSN8117
  • 08-02-2018
  A = πr² * t/60 
dA/dt = πr²/60 = π*4²/60 = 4π/15

Hope this helps!
STSN
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