2Getting The Formula Right ! When you pick up a phone you get a:Standard Dialling Tone:Place these initials in a cross.SDTThe cross now gives us:These can be written as :
3Problem 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 = 450kmWhat is the distance and the time ?T = 5.5 hours.30 min= 30/60 hours = 0.5 hours.= 81.8km/hrNow 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 TWhat is the formula for distance ?S = 450km/hrWhat is the speed and the time ?T = 5.25 hours.15min = 15/60 hour = 0.25 hoursD = 450 x 5.25Now 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 = 667.5kmWhat are the distance and the speed ?S = 89km/hrNow calculate the time.T = 7.5 hours= 7 hours 30 minutes.