Question

At 9:00 A.M. a car leaves a certain town at a speed of 90 km/hr. After 60 minutes another car leaves the same town to follow the first car. The two cars meet at 12:00 P.M.

a) Find the distance travelled by each of the two cars.

b) Find the speed of the second car.

( & it's a motion problem btw. )

Answer 1

"motion problem" Aha!, En passant we here call it "Time and distance" problem :)

Answer 2

Okay, after one hour how much distance did the first car had traveled ?

Answer 3

Okay if car travel 90km/hr how much does it travel in 60 mints ?

Answer 4

d=r*t
d=90*60
d=5400

right?

Answer 5

What is d=r*t ?

Answer 6

change in to min when u get the distance

Answer 7

speed=distance over time

Answer 8

u would get it

Answer 9

Don't think of formulas... just think simply .. what do we mean when we say " My speed is 60km/hr?"

Answer 10

distance = rate ( or speed) times time ---> formula you use it in 'motion problems' or 'Time and distance problems'

Answer 11

a) the first car traveled 3 hours at a speed of 90 km/hr => it traveled 90*3= 270Km
and since they met by this time and started from the same place then the second car also traveled the same distance 270Km

b)the second car left after 60min => at 10:00AM => it traveled for 2 hrs
its speed = distance/time = 270km/2hrs = 135km/hr

Answer 12

three hours times 90 kilometers per hours is 270 kilometers right?

Answer 13

@hoblos: nice answer, but she don't understand the concept of speed.

Answer 14

i guess if they meet at noon the distance traveled is the same for both cars

Answer 15

of course maybe it is noon on the next day.

Answer 16

Yes the distance is the same

Answer 17

saifoo! happy new year!

Answer 18

Happy new year Sat Sir. :D

Answer 19

Okay I get it now.. Thanks Hoblos :D

Answer 20

sir? lol

Answer 21

Yeah! =D

Answer 22

back atcha

Answer 23

Lol, c'mon!