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Speed Distance Time. Intermediate 1. Unit 2.

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

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Problem Solving. (1)How fast was a lorry drives 450miles in 5hours and 30 minutes. Is the question time,distance or speed ? Speed calculation. What is the formula for speed? What is the distance and the time ? D = 450km T = 5.5 hours. 30 min= 30/60 hours = 0.5 hours. = 81.8km/hrNow calculate the speed.

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(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. What is the formula for distance ? D = S x T What is the speed and the time ? S = 450km/hr T = 5.25 hours. 15min = 15/60 hour = 0.25 hours Now calculate the distance. D = 450 x 5.25 D = km

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(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 ? What are the distance and the speed ? D = 667.5km S = 89km/hr Now calculate the time. T = 7.5 hours= 7 hours 30 minutes.

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