In a map of scale 1 : 500 , the length and breath of a rectangular field are 2 cm and 3cm respectively. Find the actual area of this field. A. 30 m^2 B. 150 m^2 C. 1 500 m^2 D. 3 000 m^2 E. 15 000...

In a map of scale 1 : 500 , the length and breath of a rectangular field are 2 cm and 3cm respectively. Find the actual area of this field.

A. 30 m^2

B. 150 m^2

C. 1 500 m^2

D. 3 000 m^2

E. 15 000 m^2

3 Answers | Add Yours

justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted on

In the map all dimensions are scaled down by a ratio 1: 500. Every unit of length used on the map corresponds to 500 units of length in the real world.

If an area on the map has dimensions 2 cm * 3 cm, the actual area in the real world is 2*500*3*500 cm^2 = 1500000 cm^2. One cm^2 = `1/10000` m^2, 1500000 cm^2 = `1500000/100000` = 150 m^2

The actual area of a rectangular block with dimensions 2 cm* 3 cm on the map is 150 m^2.

The correct answer is option B

jeew-m's profile pic

jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted on

scale 1: 500 means that `500m^2` in the actual ground is represented by `1cm^2` on the map. Or in other words `500m^2` is shown in `1cmxx1cm` square on map.

Area of map `= 2xx3 = 6cm^2`

Actual area `= 6xx500m^2 = 3000m^2`

So the area of actual field is `3000m^2` and the correct answer is at option D.

aruv's profile pic

aruv | High School Teacher | (Level 2) Valedictorian

Posted on

In a map of scale 1 : 500 , the length and breath of a rectangular field are 2 cm and 3cm respectively. Find the actual area of this field.

1 unit = 500

2 unit= 2x500

=1000

and

3unit= 3x500=1500

Thus

length of the field =1000 cm

breath of the field= 1500 cm

Thus area of the field= lenght x breath

=1000 x 1500

=1500000 sq cm

since

10000 sq cm =1 sq m

1500000 sq cm = 150 sq m

Thus area of the field 150 sq m.

Correct answer is B

We’ve answered 318,930 questions. We can answer yours, too.

Ask a question