Question

Two cars A and B are 200km apart and they are traveling toward each other at the speeds of 28km/h and 22 km/h respectively. When and where will they meet?

2.

If the car A and B in problem 1 start from the same point, going toward the same direction, at what time will they be 18km apart?


3.

If B starts at 1:00pm and gives chase starting at 1:15 from the same point as B, when and where will A overtake B?




Thank you so much for answering!!

Answer 1

3. If B starts at 1:00pm and gives chase starting at 1:15 from the same point as B, when and where will A overtake B?

I think they left out A and it should read
3.

If B starts at 1:00pm and A gives chase starting at 1:15 from the same point as B, when and where will A overtake B?

Answer 2

So this question is more complicated.
First notice that B starts at 1:00 pm and A does not start until 1:15
so B gets a "head start"
can you figure out B's head start (how far did B get before A starts)

Answer 3

If B starts at 1:00pm and A gives chase starting at 1:15 from the same point as B, when and where will A overtake B? ________ you're right

Answer 4

ok

Answer 5

B gets a headstart of 15 mins??

Answer 6

yes, now what is that in distance?

Answer 7

22kph?

Answer 8

what is the formula for distance?

Answer 9

d= vt

Answer 10

what is v and what is t?

Answer 11

velocity - v
time t

Answer 12

yes, but for car B, in this problem, to figure out how far B got ahead of car A.

Answer 13

how?

Answer 14

how's it done?

Answer 15

you need B's velocity and B's time (how long B drives before A starts)

Answer 16

B drives 15mins before A

Answer 17

then?

Answer 18

you use d=v*t
to figure out d (the distance)
btw, v is km per hour so time has to be in hours (not minutes)

Answer 19

sure

Answer 20

how is it done?

Answer 21

what is B's v? how long does B drive (in hours) before A starts ?

Answer 22

22kph; 15mins before A

Answer 23

what is 15 minutes in hours?

Answer 24

1/4 hrs

Answer 25

you know v and you know t so you can find d= v*t

Answer 26

so if i multiply the two it wil result to

d= 11/2

Answer 27

now draw a picture showing where is A and where is B at 1:15