Measuring, Estimating and Units

Hong Kong

Stage 1 - Stage 3

The area of a rectangle is given by $A=l\times w$`A`=`l`×`w`, where $l$`l` is the length and $w$`w` is the width. Both length and width must be of the same units when performing the multiplication to find the area.

What would the unit for area be if the length and width are in millimeters?

m^{2}

A

cm-km

B

mm^{2}

C

mm

D

Easy

< 1min

The speed $s$`s` of an object is calculated using the formula $s=\frac{d}{t}$`s`=`d``t`, where $d$`d` is the distance travelled and $t$`t` is the time taken. Glen is carrying out a science experiment and measures the distance in millimeters and the time in hours.

Easy

< 1min

The distance an object travels can be calculated using the formula $d=s\times t$`d`=`s`×`t`, where $s$`s` is the speed of the object and $t$`t` is the time taken to travel that distance.

Easy

< 1min

The volume of a rectangular prism can be found using the formula $V=l\times w\times h$`V`=`l`×`w`×`h`, where $l$`l` is the length, $w$`w` is the width and $h$`h` is the height, and all three are in the same unit.

Easy

< 1min

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