Saturday

October 25, 2014

October 25, 2014

Posted by **christine** on Monday, June 6, 2011 at 8:28pm.

- maths -
**Reiny**, Monday, June 6, 2011 at 10:12pmI made a quick sketch and found the angle between the two paths to be 60°

So it becomes a simple Cosine Law

x^2 = 25^2 + 30^2 - 2(25)(30)cos60

= 775

x = √775 = 27.84 appr.

- maths -
**MathMate**, Monday, June 6, 2011 at 10:13pmTake x as east, and y as north, and the starting position as (0,0).

The coordinates of the first stop are

(-25cos(30°), -25sin(30°)

The second stop is simply 30km towards +y, or

(-25cos(30°), 30-25sin(30°)

=(21.65,17.5)

Use Pythagoras theorem to calculate the distance from the original point (0,0).

**Answer this Question**

**Related Questions**

Physics - Oasis B is a distance d = 7.0 km east of oasis A, along the x axis ...

physical - Oasis B is a distance d = 8.0 km east of oasis A, along the x axis ...

physics - Oasis B is a distance d = 9 km east of oasis A, along the x axis shown...

physics - A camel sets out to cross the desert, which is 49.8 km wide in the ...

physics - Ricardo and Jane are standing under a tree in the middle of a pasture...

PHYSICS - Ricardo and Jane are standing under a tree in the middle of a pasture...

Physics - A camel sets out to cross the desert, which is 42.7 km wide in the ...

physics - Ricardo and Jane are standing under a tree in the middle of a pasture...

physics - A dog searching for a bone walks 2.87 m south, then runs 22.5 m at an ...

physics (science) - John walks 1.0 km north, turns and walks 1.2 km at 50 ...