calculate the lateral surface area(that is,no ends on front and back) (in m^2) of a rectangular solid that is 1.2m high, 450 cm long, 2100mm wide. (nearest hundredth)
+118653 Chang all the units to m before you start.
Actually, it is not so straight forward because I am not sure which two equal sides you are meant to omit, probably the 2 smallest one 
They are just 4 rectangles. Find the areas and add them up. 
Have a go and if you get stuck post with what you have tried.
