The part standing up, with stripes on the back,
all the way from the table to the top, measures 3cm x 6cm x 5cm .
Volume of this part = L x W x H = 90 cm³ .
The block lying down on the table, from the left end
over to where it touches the standing-up block,
measures 4cm x 9cm x 6cm .
Volume of the lying-down part is L x W x H = 216 cm³ .
When you add up the two pieces, you get the total volume.
90 cm³ + 216 cm³ = 306 cm³
Fourth choice.
