1. Motorcycles travel 40 kilometers per hour. (1) the speed of a bicycle is three fifths slower than that of a motorcycle. How many kilometers per hour does a bicycle travel? (2) The speed of a car is 8 / 5 faster than that of a motorcycle. How many kilometers can a car travel per hour? 2. The original price of a TV set is 1500 yuan, but now it's sold at 1 / 8 of the price. How much is the price of this TV set now?

1. It is known that VMO = 40 km / h, the speed of bicycle is 3 / 5 slower than that of motorcycle, and the speed of automobile is 8 / 5 faster than that of motorcycle
Find: (1) V from; (2) V vapor
(1) According to "the speed of a bicycle is three fifths slower than that of a motorcycle"
V self = V Mo - (3 / 5) * V Mo
Therefore, the speed of bicycle is v self = 2 * V motorcycle / 5 = 2 * 40 / 5 = 16 km / h
(2) it can be obtained from "the speed of a car is 8 / 5 faster than that of a motorcycle"
V steam = V Mo + (8 / 5) * V Mo
Therefore, the vehicle speed is v steam = 13 * V motorcycle / 5 = 13 * 40 / 5 = 104 km / h
2. Known: the original price x = 1500 yuan, now the price is reduced by 1 / 8
Ask: current price y
Since the price is reduced by 1 / 8, there is a big difference
y＝X－（1 / 8）*X
The current price is y = 7 * x / 8 = 7 * 1500 / 8 = 1312.5 yuan

A bicycle can travel 12 kilometers per hour, and a motorcycle can travel 1 kilometer per hour, which takes 3 minutes less than a bicycle

The speed of motorcycle is set as the speed of motorcycle x km / min. from the meaning of the question, we know that: 1 △ 12 / 60 - 3 = 1 △ x, the speed of motorcycle is 1 / 2 km / min, and the speed of bicycle is 12 / 60 = 1 / 5 km / min, that is, the speed ratio of bicycle to motorcycle is 2:5

A bicycle can travel 12 kilometers per hour, and a motorcycle can travel 1 kilometer per hour, which takes 3 minutes less than a bicycle

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