Question

Question : A map of the city is made using the scale 1 cm = 18 m. If the park in the city is 90 m long,
what is its length in the map?

Answer 1

Answer:

5 cm

Step-by-step explanation:

We can use a ratio to solve

1 cm      x cm

-------  = ---------

18 m         90 m

Using cross products

1 * 90 = 18x

Divide each side by 18

90/18 = 18x/18

5 =x

5 cm

Answer 2

$\bf \large \longrightarrow \: \frac{1}{18} \: \times \: \frac{x}{90}$

Now , Cross Multiplying

$\bf \large \longrightarrow \: \: 18x \: = \: 90$

$\bf \large \longrightarrow \: \:x \: = \: \frac{90}{18}$

$\bf \large \longrightarrow \: \:x \: = \: \cancel\frac{90}{18} \: ^{5}$

$\bf \large \longrightarrow \: \:x \: = \: 5$

Hence , the length of map is 5 cm.