Formulas
A common conversion for 12 inches
What is 1 foot?
A boy walks at a speed of 4 km/h. How much time does he take to walk a distance of 20 km?
Five hours
change in distance over time
What is speed?
366 m/s in km/hr
What 1318 km/hr?
In a 10-km race, Grace ran the first 2 km in .2 h, the next 6 km at a speed of 9 km /h and the last stretch at 12 km/h. What was her average speed for the run?
9.67 km/h.
D/T
What is average speed
A cyclist covers a distance of 15 miles in 2 hours. Calculate his speed.
7.5 m/h
average of all speeds over a given time
What is average speed?
Scientific notation for 532.6 miles in inches.
(1 mile =5280 feet)
3.375x107?
Bella is taking an adventurous trip through a jungle. First, she trekked for 30 minutes into the thick jungle at an average speed of 6 km/h. Next, she took a boat to cross a lake which rode her at an average speed of 20 km/h for 12 minutes. For the last part of her trip, she hiked for 2 hours at an average speed of 4 km/h. Find the total distance she covered on her trip.
15 km
V*T
What is Distance?
Calculate the speed for a car that went a distance of 125 kilometers in 2 hours time.
62.5 km/hr
the interval over which change occurs
What is time?
Scientific notation for 22.7 mph in km per year.
(1 mile =1609.34 meters)
3.20x1053 km
The Earth moves roughly 94 million kilometers each year. What is the speed at which the Earth revolves around the Sun?
107 000 km/h.
The number of meters in one kilometer
What is 1000?
A car takes 4 hours to cover a distance, if it travels at a speed of 40 mph. What should be its speed to cover the same distance in 1.5 hours?
106.66 m/h
a fraction that is equal to 1 and helps you convert between different units
What is a conversion factor?
10.0 km/h in in./s
(1 meter=3.28084 feet)
109 in/s
Eric walked at an average pace of 65 m/min for the first half of the distance to his friend's house. Calculate his average speed for the second half of the distance if he took a total of 18 minutes to reach his friend's house which was 1.3 km away.
81.25 m/min
D/V
What is time
A car covers a distance of 450 m in 1 minute whereas a train covers 69 km in 45 minutes. Find the ratio of their speeds.
450: 1533.3 or 1:3.4
each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first nonzero digit
What are significant digits?
Scientific notation for 3 feet/decade in miles/day.
(1 mile= 5280 ft)
1.6x10-7 miles/day
Sally and Molly started from the same point at the same time in two different cars and drove on the same route to reach the same destination at average speeds of 40 km/h and 45 km/h respectively. If the route was 270 kilometers long and if Molly arrived at the destination at 5:30 pm, when did Sally arrive there?
6:15 pm.