A ladder ^@ 52 \space m^@ long reaches a window which is ^@20 \space m^@ above the ground on one side of a street. Keeping its foot at the same point, the ladder is turned to the other side of the street to reach a window ^@48 \space m^@ high. Find the width of the street.
In the given figure, ^@ XP ^@ and ^@ XQ ^@ are the two tangents to a circle with center ^@ O ^@ drawn from an external point ^@ X ^@. ^@ AB ^@ is another tangent touching the circle at ^@ R ^@, then ^@ XA + AR ^@ is equal to:
A camp is made in the form of a conic frustum, surmounted by a cone. The diameters of the base and top of the frustum are ^@ 16 \space m^@ and ^@ 3 \space m ^@ and its height ^@ 10 \space m ^@. The height of the camp is ^@ 15 \space m ^@. Find the quantity of canvas required to make the camp.