a map has a scale of 1:1000.
i)
What distance on the ground (in meters) is represented on the map as
(a) 2cm (b) 7.6cm?
ii)
What distance on the map represents
(a) 100m (b) 2.6km?



Answer :

Distance on the ground, represented on the map (a) 2 cm = 20 m and (b) 7.6 cm = 76 m. Distance on the map (a) 100 m = 10 cm and (b) 2.6 km = 260 cm.

The given scale = 1 : 1000

This implies, 1 cm on the map is equivalent to 1000 cm on the ground.

Let d be the variable representing answers

(i) Distance on ground in meters

(a) To find, the distance on the ground for a map distance of 2 cm

       map                        ground

       1 cm                        1000 cm

       2 cm                           d1

 => d1 = 1000 * 2 = 2000 cm = 2000 / 100 m = 20 m

(b) To find, the distance on the ground for a map distance of 7.6 cm

       map                        ground

       1 cm                        1000 cm

       7.6 cm                         d2

 => d2 = 1000 * 7.6 = 7600 cm = 7600 / 100 m = 76 m

(ii) Distance on map in centimeters

(a) To find, the distance on the map for a ground distance of 100 m

       map                        ground

       1 cm                        1000 cm

        d3                             100 m

 => d3 = 100 * 100 / 1000 cm = 10 cm

(b) To find, the distance on the map for a ground distance of 2.6 km

       map                        ground

       1 cm                        1000 cm

        d4                             2.6 km

 => d4 = 2.6 * 100000 / 1000 = 260 cm

Therefore, using the scaling factor, we get distance on the ground, represented on the map (a) 2 cm = 20 m and (b) 7.6 cm = 76 m, and distance on the map (a) 100 m = 10 cm and (b) 2.6 km = 260 cm.

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