The points R,

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ektamatta: Master | Next Rank: 500 Posts; Posts: 151; Joined: Tue May 13, 2008 7:04 pm; Location: dallas,tx usa; Thanked: 6 times

The points R,

by ektamatta » Tue May 27, 2008 8:05 pm

The points R, T, and U lie on a circle that has radius 4. If the length of arc RTU is , what is the length of line segment RU?

A. 4/3
B. 8/3
C. 3
D. 4
E. 6

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Source: Beat The GMAT — Problem Solving | Tue May 27, 2008 8:05 pm

ksh: Master | Next Rank: 500 Posts; Posts: 106; Joined: Sun Feb 17, 2008 10:09 pm; Thanked: 3 times

by ksh » Tue May 27, 2008 10:42 pm

Hi ektamatta,
please complete your question. seems u have left something !

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calande: Senior | Next Rank: 100 Posts; Posts: 34; Joined: Sun Mar 16, 2008 10:05 am; Thanked: 1 times

by calande » Wed May 28, 2008 12:55 am

Easy, circumference will be 2(r)Pi, that's 8Pi.

RTU + RU = 8Pi so as soon as we know one, we can find the other

Calande.

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getneonow: Senior | Next Rank: 100 Posts; Posts: 42; Joined: Fri Mar 14, 2008 1:56 am; Location: India; Thanked: 4 times; GMAT Score:730

by getneonow » Wed May 28, 2008 1:02 am

calande wrote:Easy, circumference will be 2(r)Pi, that's 8Pi.

RTU + RU = 8Pi so as soon as we know one, we can find the other

@calande..you interpreted it totally wrong..!!

arc RTU (major/minor) + arc RU(minor/major) = 8Pi (assuming T lies in between R and U..) but not RTU + RU = 8Pi

we have been asked the length of line segment RU but not the length of arc RU!!

When arc RTU length is given, we can definitely find line RU length but for that we need one more info in the qn which is missing.

Neo

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