Acone with radius 5 units is shown below. its volume is 105 cubic units. find the height of the cone.

height of the cone  = 4.01273885 units

Step-by-step explanation:

Volume of a cone(V) is given by:

            ....[1]

where,

r is the radius and h is the height of the cone.

As per the statement:

A cone with radius 5 units and ts volume is 105 cubic units

⇒r = 5 units and V = 105 cubic units

Substitute these given values and use in [1] we have;

Multiply both sides by 3 we have;

⇒

Divide both sides by 78.5 we have;

or

h = 4.01273885 units

Therefore, the height of the cone is, 4.01273885 units

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)