This question is actually from my math class but, it is also a psychics question I think and no one in the math forum is answering me. Please help!

Question

anonymous · Answer

Water is pouring into a cylindrical tank of height 12m and diameter = 4 (r=2) at a rate of 8m^3/min. What what rate is the surface of the water rising when the height of the surface is 9m. (note: v=pi r^2 h)

cj7529 · Answer

if the rate is 8 m^3 per min, you can work out the rate of rise of the water level from that by solving
$$8 = \pi r^{2} h$$
h will be the rise in water per min

anonymous · Answer

i had 6pi as my answer

cj7529 · Answer

i would have said 2/pi m^3 per min

anonymous · Answer

can u help me with another question?

cj7529 · Answer

yeah ill give it a go

anonymous · Answer

okaaay, just give me a sec to type it up.

cj7529 · Answer

kk

anonymous · Answer

a police officer is stationed at a speed trap 60m from the highway along a side road which is perpendicular to the highway. a car is moving along the highway, and when it is 80m from the intersection of the highway and the road, its distance from the officer is decreasing at the rate of 22m/sec. is the car exceeding the speed limit of 90hm/hr? justify your answer.

cj7529 · Answer

thats quite hard is this a leve?

anonymous · Answer

a leve? hmm?

cj7529 · Answer

A level

anonymous · Answer

what do you mean by a level?

cj7529 · Answer

never mind lol
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