A car delivers goods from place a to place B at a speed of 45 kilometers per hour and 15 hours. When it returns, the speed is six fifths of the original speed. How many hours can it return?

A car delivers goods from place a to place B at a speed of 45 kilometers per hour and 15 hours. When it returns, the speed is six fifths of the original speed. How many hours can it return?

45 × 15 ÷ (45 × 6 / 5) = 12.5 hours

A car will travel 45 kilometers per hour from place a to place B and arrive in 6 / 5 hours. If the speed is increased by 20%, it can arrive in a few hours

A bus traveled 1 / 4 of the whole journey from place a to place B on the first day and 360 kilometers on the second day. At this time, the ratio of the distance traveled and the rest is 4:6
How many kilometers are there between a and B?

The next day, the journey was complete: 4 / (4 + 6) = 2 / 5,
The whole journey is: 360 (2 / 5-1 / 4) = 2400 (km)