5:8
X:7
Cross multiply :
= 7(5)=8x
35=8x
Now divide both sides by 8
35/8= x
x= 4.375
The answer of the First one is 76
Answer:
722.57cm²
Step-by-step explanation:
Below, we have listed six basic equations that can be used to derive the explicit formulas of radius of a cylinder:
Volume of a cylinder: V = π * r² * h ,
Base surface area of a cylinder: A_b = 2 * π * r² ,
Lateral surface area of a cylinder: A_l = 2 * π * r * h ,
Total surface area of a cylinder: A = A_b + A_l ,
Surface Area of Cylinders. To find the surface area of a cylinder add the surface area of each end plus the surface area of the side. Each end is a circle so the surface area of each end is π * r2, where r is the radius of the end. There are two ends so their combinded surface area is 2 π * r2.
The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm. Substitute 8 for r and 15 for h in the formula V=πr2h . ... Therefore, the volume of the cylinder is about 3016 cubic centimeters.
<u>You Can Use Some Of These Points</u>
Answer:
solution given:
height [h]= 20 millimetres
radius [r]=20 millimetres
π=3.14
now
Volume of cylinder [V]=πr²h=3.14×20²×20=25120mm³is your answer.
Answer:
h = 31.92
Step-by-step explanation:
v = πr^2 h, so
25πh = 2507
