Approximately how many nautical miles correspond to 12 cm on a map with a scale of 1: 2 000 000?

1) Given: GS = 345 kt.Distance from A to B = 3560 NM.What is the time from A to B?

2) A chart has the scale 1: 1 000 000. From A to B on the chart measures 1.5 inches (one inch equals 2.54 centimetres), the distance from A to B in NM is:

3) A straight line drawn on a chart measures 4.63 cm and represents 150 NM. The chart scale is:

4) Approximately how many nautical miles correspond to 12 cm on a map with a scale of 1: 2 000 000?

5) In a navigation chart a distance of 49 NM is equal to 7 cm. The scale of the chart is approximately: