Question

On a map, $1$ centimeter represents $100,000$ centimeters. What is the length of a road in kilometers that measures $2.9$ centimeters on the map?

• A. $29$
• B. $2.9$
• C. $2900$
• D. $0.29$

Answer 1

Answer: (B)

$2.9$

In map $1$ cm $=100,000$ cm

$\therefore 2.9cm=\frac{100000}{1}\times 2.9=290000cm$

As $1$ km $=1000$ m

$1000$m $=100000$ cm

$\therefore 1$ km $=100000$cm

Then $290000$ cm $=\frac{290000}{100000}=2.9$ km