1xbxhx3 49x33x24 3 7 4x 4 22 r 7x7 x 7 3 3 3 1 r 21 cm Hence right option is 21 cm i e option a 11 A mason construction a wall of dimensions 270 cm x 300 cm x 350 cm with the b each of size 22 5 cm x 11 25 cm 8 75 cm and it is assumed that space is covered 8 the mortar Then the number of bricks used to construct the wall is