Barry is driving back home to Sue after a weekend away. If he travels at an average speed of 60kmph, the journey will take 40min longer then if he traveled at an average speed of 15kmph faster.
How far apart have Barry and Sue been this weekend?
D/60 - D/75 = 2/3 D (15/(60×75)) = 2/3 D = (2/3) × (75×4) = 200 Km. So Barry and Sue are 200 Km away from each other.
Jatin travels a distance of 100 km in 5 hours. How much faster in kilometer per hour, on an average, must he travel to make a journey in 5/3 hour less time?
A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
A cyclist covers his outward journey at 15 mph.
The return, over exactly the same distance, is uphill. He completes it at 5 mph.
What is the cyclist's average speed over the entire journey?
A fire engine travels 7 kms to a fire at a speed of 42 kmph.
Its tank holds 500 litres of water but has been leaking at a rate of 25 litres per hour throughout the journey.
The fire engine needs 497 litres of water to put out the fire.
Will it succeed?
