Solve the following system of linear equations by using the method of elimination by equating the coefficients.
@^\begin{aligned}
& \dfrac { x } { 3 } + \dfrac { y } { 5 } = 50 \\
& \dfrac { x } { 9 } + \dfrac { y } { 2 } = 47
\end{aligned}@^
The areas of two similar triangles are ^@ 144\space cm^2^@ and ^@16\space cm^2^@ respectively. If the altitude of the bigger triangle is ^@10.8 \space cm^@, find the corresponding altitude of the smaller triangle.
In the given figure, three circles with centers ^@ A, B, ^@ and ^@ C ^@ touch each other externally. If ^@ AB = 9 \space cm, BC = 11 \space cm,^@ and ^@ AC = 8 \space cm^@. What is the radius of the circle with center ^@B^@ ?
A chord of a circle of radius ^@ 28 \space cm ^@ subtends a right angle at the center. Find the area of the corresponding major segment.^@ \bigg[\pi = \dfrac { 22 } { 7 }\bigg] ^@
A object is in the form of a hollow hemisphere mounted by a hollow cylinder. The diameter of the hemisphere is 3 cm and the total height of the object is 84 cm, then choose the correct inner surface area of the object.