GATE Civil 2023 Set 2 | Question: 25

Question

If the size of the ground area is $6 \mathrm{~km} \times 3 \mathrm{~km}$ and the corresponding photo size in the aerial photograph is $30 \mathrm{~cm} \times 15 \mathrm{~cm}$, then the scale of the photograph is $1 :$ ____________ (in integer).