Question

The actual length and width of a rectangular ground are 100 m and 20 m, respectively. The scale factor used in a drawing of the ground is $\frac{1}{1000}$. What is the perimeter of the ground in the scale drawing?

• A. 0.40 m
• B. 0.24 m
• C. 0.45 m
• D. 0.20 m

Answer 1

The correct option is B 0.24 m

Actual length of the rectangular ground $=100m$
Actual width of the rectangular ground $=20m$
Actual perimeter of the rectangular ground $=2\times (100+20)=240m$
Perimeter of the ground in scale drawing
= Scale factor × Actual perimeter of the rectangular ground $=\frac{1}{1000}\times 240=0.24m$