You need to find the volume of the trapezium.
So find the average length by adding 6 and 12 and dividing it by 2.
That will give you 9cm. Multiply that by the height to get the area.
( 9 x 5). You should get 45cm squared
Multiply by the width to get the volume ( 45 x 16) = 720cm cubed
Then use the equation, density = mass/ volume so mass = density x volume
720 x 19.3 = 13896g, convert to kg by dividing by 1000 = 13.896kg
#how do i do this
obtuse vale
reef gate
thank you sm ur better then like all of my teachers