1. Speed Distance Time.
Intermediate 1.
Unit 2.

2. Getting The Formula Right !
When you pick up a phone you get a:
Standard Dialling Tone:
Place these initials in a cross. S D T
The cross now gives us:
These can be written as :

3. Problem Solving.
How fast was a lorry drives 450miles in 5hours and minutes.
Is the question time,distance or speed ?
Speed calculation.
What is the formula for speed?
D = 450km
What is the distance and the time ?
T = 5.5 hours.
30 min= 30/60 hours = 0.5 hours.
= 81.8km/hr
Now calculate the speed.

4. (2) How far did a plane go if it travels at 450km/hr for 5hours and 15 minutes ?
Is the question time,distance or speed ?
Distance calculation.
D = S x T
What is the formula for distance ?
S = 450km/hr
What is the speed and the time ?
T = 5.25 hours.
15min = 15/60 hour = 0.25 hours
D = 450 x 5.25
Now calculate the distance.
D = km

5. (3) How long will a train take to travel 667.5km at 89km/hr ?
Is the question time,distance or speed ?
Time calculation.
What is the formula for Time ?
D = 667.5km
What are the distance and the speed ?
S = 89km/hr
Now calculate the time.
T = 7.5 hours
= 7 hours 30 minutes.