Answer:
Step-by-step explanation:
The distance travelled by Lisa in the first four hours of her trip is:
The distance remaining and her average speed are, respectively:
Answer:
The volume of given cone is 602.88 cube units
Step-by-step explanation:
<u>Formula:</u>
Volume of cone, V = πr²h
r - Radius of cone
h - height of cone
<u>To find the volume</u>
Here, r = 4 and h = 12
Volume V = πr²h
V = 3.14 *4²*12
V = 3.14*4*4*12
Volume V = 602.88
Therefore the volume of given cone is 602.88 cube units
<u>Answer:</u>
Lengths of the sides (there are 3 sides in an equilateral triangle) of the base of prism is <u>5.72cm </u>each.
<u>Step-by-step explanation:</u>
As the base of triangular prism is equilateral:
∴ Area of base = (√ 3 / 4)× (side)²
According to question:
height of prism = height (side) of base
Volume of prism = 81 cm³,
∴ Volume of prism = Area of base x height
⇒ 81 cm³ = (√ 3 / 4)× (side)² × height ∵ side = height
⇒ 81 cm³ = (√ 3 / 4)× (side)³
⇒ 81 × (4/√3) cm³ = side³
⇒ ∛(81 × (4/√3) cm = side
⇒ side = <u>5.72cm</u>
It could be The 4.0 cm would be the base and 2.8cm would be the length upwards
