Question

1. place if necessary. area: ____________ 42 m

Explanation:

Step1: Calculate area of upper rectangle

$54\times54 = 2916$ square - ft

Step2: Calculate area of lower rectangle

$90\times54=4860$ square - ft

Step3: Calculate total area

$2916 + 4860=7776$ square - ft

Answer:

7776 square - ft