Question

Two students, 100 meters apart on the same path, arewalking towards one other. Student A has a speed of 2meters each second; Student B has a speed of 3 meterseach second. Let's suppose they start to walk to eachother when t=0. How many seconds will it take for thestudents to bump into one another? Give your answer tothe nearest whole number

Answer 1

D = RT

Where

D is distance

R is speed

T is time

Distance of student 1:

`D_1=2t`

Distance of student 2:

`D_2=3t`

Now,

When they meet, their distance would total 100, so we can write:

`D_1+D_2=100`

We can also write:

`D_1=100-D_2`