Question

Rupert's backyard is 10 m by 5 m. The area of the yard is:

50 m
50 m^2
15 m
15 m^2

Answer 1

I think it is b

Answer 2

A= L*W

L = 10 m
W = 5 m

A = (10)(5) = 50 m^2

Answer 3

a=l*b square units

Answer 4

If you keep the units in the formula for the area, you'll get them right.
Assuming this is a rectangular backyard, the area id given by the length times the width:
A = L * W
Since we are told L = 10 m and W = 5 m, plug them into the formula with the units:
A = 10 m * 5 m = 10 * 5 * m * m = 50 m^2