If you travel 30 kilometers per hour, you will arrive 15 minutes earlier. If you travel 15 kilometers per hour, you will be 5 minutes late If you plan to arrive five minutes in advance, what should be the speed of the motorcycle?

If you travel 30 kilometers per hour, you will arrive 15 minutes earlier. If you travel 15 kilometers per hour, you will be 5 minutes late If you plan to arrive five minutes in advance, what should be the speed of the motorcycle?

If you need to arrive 5 minutes in advance, the speed of motorcycle should be 20 kilometers per hour. (30 km / h = 0.5 km / min, 15 km / h = 0.25 km / min) s = V * h0.5 * (h-15) = 0.25 * (H + 5) -- (set h as the right time of arrival); H = 35 minutes, s = 10 kilometers. If you arrive 5 minutes in advance, s = V * (35-5) v = 10 / 3

If you travel 30 kilometers per hour, you can arrive 15 minutes earlier. If you travel 15 kilometers per hour, you will be 5 minutes late. If you plan to arrive 5 minutes earlier, what is the speed of the motorcycle?

15 minutes = 14 hours, 5 minutes = 112 hours, the specified time is: (30 × 14 + 15 × 112) / (30-15), = (7.5 + 1.25) / - 15, = 8.75 / - 15, = 712 (hours); the distance to the railway station is: 30 × (712 − 14), = 30 × 13, = 10 (kilometers); if 5 minutes ahead of time, the speed is: 10 ^ (712-112), = 10 ^ 12, = 20 (kilometers). A: if you plan to arrive 5 minutes ahead of time, then The speed of motorcycle should be 20 kilometers per hour

Mr. Wang went from school to the teaching and Research Council for a meeting. When he started, he looked at his watch and found that he would be 6 minutes late if he walked 100 meters per minute. If he rode a bicycle 200 meters per minute, he would arrive early
How long will it take for Mr. Wang to leave in three minutes? The second question is how long will it take for him to carry 1000 glass bottles. It is stipulated that the safe transportation path is 30 cents, but if he breaks one, he will not pay for the freight and 5 cents. After the transportation, he will get 260 yuan. How many bottles are broken in the transportation
Another problem is that the vegetable store delivers 260kg of three kinds of vegetables, and the weight of green vegetables and radish is 40kg less than that of green vegetables

1. 100 * (6 + 3) / (200-100) + 3 = 12 minutes
2. (0.3 * 1000-260) / (0.3 + 0.5) = 50
3. Vegetables: 3 * (260 + 40) / (3 * 2 + 4) = 90kg
Radish: 4 * 90 / 3 = 120kg
Potato: 90-40 = 50kg