Question

An aeroplane is flying at a speed of 720 km/h.
1. If the aerial distance between two cities is 1800 km, how much time will the aeroplane take in crossing these cities?
2. How much distance does the aeroplane cover in 40 minutes?
3. How far will it fly in 15 second?​

Answer 1

1 - 2 ½ hour or 150 minutes

2 - 480 km

3 - 3km

Step-by-step explanation:

1 -

1 hour = 720 × 2

= 1440

- 1800

= 360

= ½

= 2 ½ hour

2 -

1 hour = 720 km

30 minutes = 360 km

15 minutes = 180 km

5 minutes = 60 km

360 + 120 ( 30 minutes + 10 )

= 480 km

3 -

1 hour = 720 km

÷ 60 minutes

= 12 km per minute

= 6 km per 30 seconds

= 3 km per 15 seconds