A cone has a diameter of 18 unitis and height of 8 unit's. what is it's volume

a: 72πcubic units
b:216πcubic units
c:648πcubic units
d:864πcubic units

216πubic unit

Step-by-step explanation:

A cone is a solid shape.

Volume of cone = 1/3 πr²h

Where height(h) = 8 units and diameter = 18 units, π = 3.14

Note radius (r) = diameter ➗ 2 = 18/2 = 9 units

Therefore,.

Volume of cone = 1/3 x π x r x r x h

Volume = 1/3 x πx 9  x 9 x 8

Volume = 648π➗ 3

Volume = 216πubic unit

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b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.