Question

A map is given with a scale of 2cm=50km. What is the actual distance between two places if they are 7.5cm apart on the map?

Answer 1

Using unitary method,

2 cm represents 50 km
so, 1 cm represents 50/2 km
or, 7.5 cm represents (50/2 x 7.5) km
= (25 x 7.5) km
= 187.5 km

Therefore, the actual distance between the two places is 187.5 km .

Answer 2

1cm= 25km
given distance = 7.5
25×7.5 =187.5km