SOLUTION: HELLO. please help me with this.. Tess is flying an airplane from Wainfelt to her cpttage at a constant speed. She takes off at noon and passes ST. Cathrines at 12:15. Tess

Algebra ->  Linear-equations -> SOLUTION: HELLO. please help me with this.. Tess is flying an airplane from Wainfelt to her cpttage at a constant speed. She takes off at noon and passes ST. Cathrines at 12:15. Tess      Log On


   

Question 111226: HELLO.
please help me with this..


Tess is flying an airplane from Wainfelt to her cpttage at a constant speed. She takes off at noon and passes ST. Cathrines at 12:15. Tess knows that St. Cathrines is 40 km away from Wainfelt.
a)How fast is Tess plane flying per hour in kilometers

b) Write an equation relating distance travelled to flight time.

c) Assuming Tess continues on a straight path, at what time will she arrive aat her cottage whch is 360 km due to north of ST. Ccatherines.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
The basic formula required is d=rt.
:
We know the distance to be 40km and the time to be 15 minutes or 0.25 hour, so if d=rt, then
r=d%2Ft
r=40%2F0.25
r=160kmph
:
d=rt
d=160t
:
if d=rt, then t=d%2Fr, so:
t=360%2F160
t=9%2F4hours, or 1 hour and 45 minutes after she passes St. Catherines. 1 hour and 45 minutes after 12:15 is 2:00 PM.
:
Hope that helps,
John