A cylinder pipe, made of metal is 3cm thick.If the intern...
A cylinder pipe, made of metal is 3cm thick.If the internal radius of the pipe is 10cm.Find the volume of metal used in making 3m of the pipe.
153\(\pi\)cm3
207\(\pi\)cm3
15 300\(\pi\)cm3
20 700\(\pi\)cm3
Correct answer is D
Volume of a cylinder = πr\(^2\)h
First convert 3m to cm by multiplying by 100
Volume of External cylinder = \(π \times 13^2 \times 300\)
Volume of Internal cylinder = \(π \times 10^2 \times 300\)
Hence; Volume of External cylinder - Volume of Internal cylinder
Total volume (v) = \(π (169 - 100) \times 300\)
V = \(π \times 69 \times 300\)
V = 20700πcm\(^3\)
The sine, cosine and tangent of 210o are respectively ...
The angle of a sector of a circle radius 10.5cm is 120°. Find the perimeter of the sector [Take ...
The angle of a sector of a circle of diameter 8cm is 135°. Find the area of the sector [Take \(\...
Find a two-digit number such that three times the tens digit is 2 less than twice the units dig...
Simplify \(\frac{(√12-√3)}{(√12+√3)}\) ...
In the diagram above, O is the center of the circle and ∠POR = 126°. Find ∠PQR ...
Find the principal which amounts to N5,500 at a simple interest in 5 years at 2% per annum. ...
In the figure, PQR is a semicircle while PQ and QR are chords. QS is the perpendicular fro...
In triangle XYZ, ∠XYZ = 15o, ∠XZY = 45o and lXYl = 7 cm. Find lYZl....