Question

Парусная лодка за 4ч проплыла 28 км, а плот за 5ч проплыл 20 км. на сколько скорость парусной лодки больше скорости плота

Answer 1

( 28 : 4 ) -( 20 : 5 ) = 3(км/ч) - разница

Answer 2

Calculating the Speed of the Sailboat and Raft

To compare the speeds of the sailboat and the raft, we can calculate their respective speeds using the given distance and time values.

The formula to calculate speed is: \[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]

Using this formula, we can calculate the speed of the sailboat and the raft.

Speed of the Sailboat

The sailboat covered a distance of 28 km in 4 hours. Using the formula, the speed of the sailboat can be calculated as: \[ \text{Speed of Sailboat} = \frac{28 \text{ km}}{4 \text{ hours}} = 7 \text{ km/h} \]

Speed of the Raft

The raft covered a distance of 20 km in 5 hours. Using the formula, the speed of the raft can be calculated as: \[ \text{Speed of Raft} = \frac{20 \text{ km}}{5 \text{ hours}} = 4 \text{ km/h} \]

Comparing the Speeds

Now, to find out how much faster the sailboat is compared to the raft, we can calculate the difference in their speeds: \[ \text{Difference in Speed} = \text{Speed of Sailboat} - \text{Speed of Raft} = 7 \text{ km/h} - 4 \text{ km/h} = 3 \text{ km/h} \]

The speed of the sailboat is 3 km/h faster than the speed of the raft.