Question

The length of a building on a map is 2 mm. The scale used in the map is 1 mm = 1/ 8 km . Calculate the actual length of the building in meters

Answer 1

Step-by-step explanation:

1 mm = 1/8 km

1 mm = 0.000125 meter

2 mm = 2 x 0.000125 meter

2 mm = 0.00025 meter

Answer 2

Answer:

The actual length of the building in meters is 250 meters.

Step-by-step explanation:

Given,length of a building on a map is 2 mm and it is also given

$1 \: mm = \frac{1}{8} \: km$

By Unitary method,

$2 \: mm \: = \frac{1}{8} \times 2 \: km \\ = \frac{1}{4} \: km$

Here we want to find value of the length of the building in meters.

We know,

$1 \: km \: = 1000 \: m$

So,

$\frac{1}{4} \: km = \frac{1}{4} \times 1000 \\ = 250 \: m$

This is a problem of Algebra.

Some important Algebra formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Know more about Algebra,

1) https://brainly.in/question/13024124

2) https://brainly.in/question/1169549