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Sagot :
Let b be the speed of the boat ;
c be the speed river's flow (aka current)
Remember that distance = speed x time
When the boat travels downstream, it goes with the current. Thus, its speed is increased.
The downstream travel is represented by the equation
2 (b+c) = 64 (2 hours is the amount of time it traveled; 64 is the total distance traveled)
On the other hand, when it travels upstream, the boat goes against the current. Thus, its speed is decreased. This is shown by the equation
3 (b-c) = 54 (it took 3 hours to travel 54 km)
We now have a system of equation with two variables.
2b + 2c = 64 ––> b + c = 32
3b - 3c = 54 ––> b - c = 27
2b = 59
b = 59/2 = 29.5
c = 2.5
Therefore, the rate of the river's flow is 2.5 km/hour
c be the speed river's flow (aka current)
Remember that distance = speed x time
When the boat travels downstream, it goes with the current. Thus, its speed is increased.
The downstream travel is represented by the equation
2 (b+c) = 64 (2 hours is the amount of time it traveled; 64 is the total distance traveled)
On the other hand, when it travels upstream, the boat goes against the current. Thus, its speed is decreased. This is shown by the equation
3 (b-c) = 54 (it took 3 hours to travel 54 km)
We now have a system of equation with two variables.
2b + 2c = 64 ––> b + c = 32
3b - 3c = 54 ––> b - c = 27
2b = 59
b = 59/2 = 29.5
c = 2.5
Therefore, the rate of the river's flow is 2.5 km/hour
Umaasa kaming naging kapaki-pakinabang ang aming mga sagot. Bumalik anumang oras para sa karagdagang impormasyon at mga sagot sa iba pang mga tanong na mayroon ka. Pinahahalagahan namin ang iyong oras. Mangyaring bumalik anumang oras para sa pinakabagong impormasyon at mga sagot sa iyong mga tanong. Maraming salamat sa pagtiwala sa Imhr.ca. Bisitahin kami ulit para sa mga bagong sagot mula sa mga eksperto.