The volume of the prism: V = L x W x H, where L is the length, W the width and H the height. We can find the volume of the entire figure by adding together the volumes of two smaller figures ( 2 prisms ). The 1st one has dimensions: 2, 2, 7 and the 2nd has dimensions 2, 3, 8. Answer: B . ( 2 x 2 x 7 ) + ( 2 x 3 x 8 )