Step-by-step explanation:
Given,
Side length of each cube = 9 in.
no. of cubes glued together = 3.
now,
surface area of cube = 6s²
after inserting values we got,
6 × 9² = 6 × 81 = 486 inches.
so,
Surface area of all 3 cubes = 3 × 486 = 1458 inches.
hence, surface area of the figure is 1458 inches.
hope this answer helps you dear...take care and stay safe !
