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A and B planes fly from two airports 750 km apart at the same time and arrive at the same Midway Airport for half an hour. If the speed of a plane is 1.5 times that of B plane, what is the speed of B plane?
750 △ 0.5 × 11.5 + 1 = 1500 × 25 = 600 km a: the speed of B plane is 600 km per hour
The fifth grade mathematics application question (formula solution)
1. The number of a is 5 times of the number of B. if the number of a plus 4 and the number of B minus 1.6, then the number of a is 5 times of the number of B. what are the numbers of a and B?
2. The average score of Chinese, mathematics and geography in Xiaoming midterm exam is 96, and the common sense score is 3 points less than that of Chinese, mathematics, geography and common sense
In a hurry
There are problems with both questions
On the solution of mathematical application problems
The car uses 13.5kg of oil per 100km. After improving the equipment, it can save 1.5kg of oil per 100km per day. How many kilometers of oil can the car use now
It used to take oil to travel 300 kilometers
13.5 * 3 = 40.5 (kg)
It's ok now
40.5 / (13.5-1.5) * 100 = 337.5 (km)
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