Jordan has 12 feet of lumber to make wooden sign. If each sign requires 2/3 of a foot of lumber,how many sign can he make
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Since this is a round-trip, Christy covered the same distance in both journey.
Let the distance covered be
When she left the house, she travelled at
We were given the average speed to be
Meaning if we add the speed in the return journey to 24 kph and find the average , we must obtain 20 kph.
Let
be the speed in the return trip.
Then
We solve for x to obtain;
We were also told that she took half an hour longer in the return trip.
If we let
represent the time the first journey took, then the return trip will take
Now we have the following:
Now let us equate the two equations to obtain,
We expand and simplify to obtain;
This implies that,
.
Hence the return trip took,
hours.
Let the distance covered be
When she left the house, she travelled at
We were given the average speed to be
Meaning if we add the speed in the return journey to 24 kph and find the average , we must obtain 20 kph.
Let
be the speed in the return trip.
Then
We solve for x to obtain;
We were also told that she took half an hour longer in the return trip.
If we let
represent the time the first journey took, then the return trip will take
Now we have the following:
Now let us equate the two equations to obtain,
We expand and simplify to obtain;
This implies that,
.
Hence the return trip took,
hours.