1. Convert the following:
a) 60km/h to m/s
b) 30km/litre to m/millilitre
c) 50m/s to km/h
d) 800cm/s to m/min
e) 10cents/g to *rupees/kg
f) 90km/h to cm/min
g) *R50/m2 to cents/cm2
h) 10m/millimitre to km/litre
*Seychelles ruppes (look it up on the internet if u don't know) *R stands for rupees |
2. A worker's annual salary is R60, 000. What is his rate of earning per month?
3. A motorcycle covers a distance of 60km on 3litres pf petrol. What is it's average rate of compsuption in km per litre?
Hi Eloise,
I shall try and explain how these are done.
1. Convert the following:
a) 60km/h to m/s
First write them as upright fractions.
\(\frac{60km}{1hour}\)
Now, there are 1000m in a km so 60km=60*1000metres and
1 hour = 60 minutes and each minute = 60 seconds so 1 hour = 60*60 seconds.
No I'll show you how it all comes together. :)
\(\frac{60km}{1 hour}\\ =\frac{60*1000\;metres}{1*60\;minutes}\\ =\frac{60000\;metres}{60*60seconds}\\ =\frac{600\not{0}\not{0}\;metres}{6\not{0}*6\not{0}seconds}\\ =\frac{\not{6}^100\;metres}{6*\not{6}seconds}\\ =\frac{100\;metres}{6seconds}\\ =16.\dot6\;m/s\)
b,c,d,e, f and h are all very similar, you should try them for yourself and then get us to check your answers.
b) 30km/litre to m/millilitre
c) 50m/s to km/h
d) 800cm/s to m/min
e) 10cents/g to *rupees/kg
f) 90km/h to cm/min
g is a bit trickier - since there are 100cm in a metre, there must be 100^2 = 10000 cm^2 in a metre ^2
Now you know that, it is the same as the others :)
g) *R50/m2 to cents/cm2
h) 10m/millimitre to km/litre
*Seychelles ruppes (look it up on the internet if u don't know)
*R stands for rupees
2. A worker's annual salary is R60, 000. What is his rate of earning per month?
HINT: How many months are there in a year?
3. A motorcycle covers a distance of 60km on 3litres pf petrol. What is it's average rate of compsuption in km per litre?
This is a straight division question. km divided by litres
Have a go at some of them by yourself now :)