Distance between coordinates - C

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 103
Joined: Wed May 30, 2007 6:17 am
Followed by:1 members

Distance between coordinates - C

by tanyajoseph » Sat Sep 01, 2007 10:30 am
In the xy plane, point P has coordinates (a,b) and point Q has coordinates (c,d). What is the distance between P and Q?

1) b - d = 4
2) a - c = 3

Master | Next Rank: 500 Posts
Posts: 101
Joined: Tue Aug 07, 2007 1:45 am
Followed by:1 members

by agps » Sat Sep 01, 2007 11:10 am
distance between two points in a xy plane is given by sqrt((y2-y1)^2+(x2-x1)^2)

1) gives you y2-y1, but nothing on x2-x1, so insufficient.

2) gives you x2-x1, but nothing on y2-y1, so insufficient.

using bot you get the distance as sqrt(4^2+3^2) = sqrt(16+9) = sqrt(25) = 5.

Answer is C