Ascale drawing for a plot of land is shown below. in the drawing, 3 cm represents 4 m. assuming the back is rectangular, find the area of the real backyard . (show work and explain i need asap)

We know that

[scale]=[drawing]/[real]> [real]=[drawing]/[scale]
scale=3 cm/ 4 m> 0.75 cm/m

the dimensions of backyard in the drawing are 9 cm x 6 cm

step 1
find the real dimensions of backyard

for 9 cm
[real]=[drawing]/[scale]
[real]=[9]/[0.75]> 12 m

for 6 cm
[real]=[drawing]/[scale]
[real]=[6]/[0.75]> 8 m

so 

the real dimensions of backyard are 8 m x 12 m
[the area of the real backyard ]=8*12> 96 m²

the answer is 96 m²