Question

The plan of a map was photo-copied to a reduced size such that a line originally 100 mm, measures 90 mm. The original scale of the plan was 1 : 1000. The revised scale is

• A. 1 : 900
• B. 1 : 1221
• C. 1 : 1111
• D. 1 : 1121

Answer 1

The correct option is C 1 : 1111

Shrinkage factor
$=\frac{90}{100}=0.9$
$\text{Revised scale}=\text{original scale}\times \text{shrinkage factor}$
$=\frac{1}{1000}\times 0.9=\frac{1}{1111.11}$