On a map of a state, 1cm represents 5 km. Construct a plain scale capable of measuring distance between two cities 100 km far from each other. Calculate R.F. & show the distance of 73 km on the scale.

Plane Scale

Question: On a map of a state, 1cm represents 5 km. Construct a plain scale capable of measuring the distance between two cities 100 km far from each other. Calculate R.F. & show the distance of 73 km on the scale.

Solution:

• R.F. = 1/500000
• Max Length(M.L.) = 100 km
• Length of Scale(L.O.S.) =  1/500000 × 100 × 100000 = 20 cm

Plain Scale

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