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# The shaded portion of the figure represents a tunnel's

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Manager
Joined: 26 Aug 2003
Posts: 232

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03 Dec 2003, 08:02
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The shaded portion of the figure represents a tunnel's semicircular entrance with center C. How many feet high is the entrance at the point on the horizontal line L that is 10 feet from C?
(1) The diameter of the entrance is 60 ft.
(2) The entrance is 24 feet hight at a point on L that is 18 feet from C.
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Tunnel.JPG [ 2.52 KiB | Viewed 1473 times ]

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Director
Joined: 28 Oct 2003
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03 Dec 2003, 08:33
A is sufficient (draw a radius (30) from the center of the circle, use the distance from the center of 10 given in the problem, thank pythagoras.)

B is sufficient as well, since you can use the data given in B to determine the radius of the circle.

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Manager
Joined: 26 Aug 2003
Posts: 232

Kudos [?]: 13 [0], given: 0

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05 Dec 2003, 07:07
Anyone else wanna take a shot before I put the official answer up?

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05 Dec 2003, 07:07
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