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/Tag: Rates
10 02, 2019

## Heart Rate

By |2019-02-10T15:12:43+10:00February 10th, 2019|Tags: , , |Comments Off on Heart Rate

Heart Rate Maximum Heart Rate (MHR) = 220 - Age in years  beats per minute Target Heart Rate (THR) is between 65% and 85% of the MHR bpm = beats per minute Target heart rate is the desire range of heart rate to ensure the most benefit from a workout Go [...]

6 12, 2018

## Time & Work

By |2018-12-06T16:30:49+10:00December 6th, 2018|Tags: , , |Comments Off on Time & Work

Time & Work Go to the Forum to see more questions or ask your own Worked examples If 3 men take 2 days to dig a trench, how long would it take for 4 men? 3 × 2 = 6 days Step 1: Find out how long it takes for one [...]

1 12, 2018

## Converting km/h & m/s

By |2018-12-01T11:39:04+10:00December 1st, 2018||Comments Off on Converting km/h & m/s

Converting km/h & m/s Go to the Converting Forum to see more questions or ask your own Formulas used in  km/h → m/s: × 1000 ÷ 60 ÷ 60 m/s → km/h: ÷ 1000 × 60 × 60 Worked examples  Convert 50m/s into km/h.  50 ÷ 1000 × 60 × 60 = 180km/h To convert from [...]

29 11, 2018

## Rates

By |2018-12-06T15:13:16+10:00November 29th, 2018|Tags: , , |Comments Off on Rates

Rates Go to the Rates Forum to see more questions or ask your own Worked examples Jessica received 1.8L of fluid over 12 hours. What is the flow rate in ml/h? 1.8 × 1000 = 1800ml change the 1.8L to ml  there are 1000ml in a litre 1800 ÷ 12 = [...]

21 03, 2018

## Challenging Rates

Challenging Rates Questions The first snow of the season begins to fall during the night. The depth of the snow, h, increases at a constant rate through the night and the following day. At 6 am a snow plough begins to clear the road of snow. The speed, [...]

23 07, 2016

## Best Value

By |2016-11-05T16:00:25+10:00July 23rd, 2016|Tags: , , , |Comments Off on Best Value

Best Value worked examples What is the best buy? a. 20 for $15.60 b. 50 for$28.40   c. 100 for $65.00$15.60 ÷ 20 = $0.78 each$28.40 ÷ 50 = $0.57 each$65.00 ÷ 100 = \$0.65 each best buy represents the best value for money. Find the unit price for each [...]

23 07, 2016

## Speed

By |2016-11-08T08:35:48+10:00July 23rd, 2016|Tags: , , |Comments Off on Speed

Speed $speed=\frac{distance}{time}$ worked examples If you ran 32 km in 8 hours. At what speed are you running?   $s=\frac{32}{8}$ = 4 4km/h $speed=\frac{distance}{time}$ distance = 32, time = 8 substitute into formula Julie leaves Sydney at 5:00 pm heading to Newcastle, 270 kilometres away averaging at a speed [...]

20 05, 2016

## Time & Work

By |2017-04-21T13:40:57+10:00May 20th, 2016|Tags: , , |Comments Off on Time & Work

Time & Work   worked examples If 3 men dig a ditch in 4 days, how long would it take 2 men to dig the same ditch? 1 man = 3 × 4 = 12 days   Step 1: find how long it would take 1 man by himself.  Since [...]

27 08, 2015

## Ratios

By |2016-11-05T18:30:27+10:00August 27th, 2015||Comments Off on Ratios

Ratios worked examples further examples harder examples

25 08, 2015

## Challenging Speed Questions

By |2016-11-05T18:31:18+10:00August 25th, 2015||Comments Off on Challenging Speed Questions

Challenging Questions A riverboat cruise liner boat travels 8km upstream and 8km downstream.The total time for both parts of the trip is 3 hours. The speed of the stream is 2km/h. what is the speed of the boat in still water? let the speed be x upstream x -2  as [...]