Two tourists left two towns simultaneously, the distance between which is 38 km, and met in 4 hours. What was the speed of each of the tourists, if the first one covered 2 km more than the second one before they met

= 5 km/hr

= 4.5 km/r

Step-by-step explanation:

Distance of two tourists can be represented by and  

Therefore, the total distance would be

+ =38  ----> (eq1)

->if the first one covered 2 km more than the second

= +2   (substituting this in above equation)

We will have,

( +2)+ =38

2+2=38

2=36

= 36/2

=18

plugging value of in eq(1)

eq(1)=>

 + = 38

 + 18 =38

= 20 km

the distance of each of the tourists

=20km and =18km

As they both traveled for 4 hrs

t=4hr

speed can be defined as distance per unit time i.e

speed 'v' = distance 'd' / time 't'

Let and represent speed of each of the tourists

Therefore,

=  /t => 20/4

= 5 km/hr

=   /t => 18/4

= 4.5 km/r

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies

2x + 8

step-by-step explanation: