Friday

January 30, 2015

January 30, 2015

Posted by **george** on Friday, December 31, 2010 at 8:08pm.

- related rate problem -
**bobpursley**, Friday, December 31, 2010 at 8:33pmWell, 4 seconds after crossing, the train has traveled 240 m. Draw your figure, lets are 60, 240, and the hypotenuse is L=sqrt (60^2+240^2)

But in general, l^2=x^2+60^2

2L*dL/dt=2x dx/dt

you are solveing for dL/dt, you know x, dx/dt, and L.

**Answer this Question**

**Related Questions**

math word problem - A car is traveling on a road that is perpendicular to a ...

science physics - A chicken decides to cross a road. The road is perfectly ...

College Algebra - car traveling on a road perpendicular to railroad track, car ...

Physics - A jet is circling an airport control tower at a distance of 23.0 km. ...

trig - a hedgehog wishes to cross a road without being run over. he observes the...

physics - an auto, moving too fast on a horizontal stretch of mountain road, ...

Physics, HELP - AN auto, moving too fast on a horizontal stretch of mountain ...

calculus : related rates - a balloon rises at a rate of 3 meters per second from...

Math - At one point on a mountain road, the elevation is 1250 meters. Three ...

trig - This a problem I need help with. A vertical ple stands by a road that is ...