On a certain map of India the actual distance of 1450 km between two cities Delhi and Kolkata is shown as 5 cm. What scale is used to draw the map ?

Answer: Option D

5 cm on the map represents 1450 km
∴ 1 cm on the map represents $$\left(\frac{1450}{5}\right)$$  km = 290 km
Hence, the scale is 1 cm : 290 km i.e., $$1:29\times 10^6$$
$$\left[\because 290\text{km}=\left(29\times {10}^6\right)\text{cm}\right]$$