Mathematics, 29.06.2019 04:00, chaanah

Aboat is traveling in a river that is flowing downstream at a speed of 10 kilometers per hour. the boat can travel 30 kilometers upstream in the same time it would take to travel 40 kilometers downstream. what is the speed of the boat in still water?

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Mathematics, 22.07.2019 00:31, josecano2

Aboat traveling upstream goes 84 kilometers in 7 hours. if the return trip takes only 3 hours, what is the speed (in kilometers per hour) of the boat still in water?

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Mathematics, 01.08.2019 04:00, roro2599

Arowing team is practicing on a river. when the boat travels downstream, the current increases the speed of the boat. but when the boat travels upstream, the current decreases the speed of the boat. the team wrote a system letting s represent the speed in calm water and c represent the speed of the current. they found the solution for the system (s, c) to be (14, 6). how fast was the team traveling upstream and downstream? a. the team traveled at 6 km per hour upstream and 14 km per hour downstream. b. the team traveled at 14 km per hour upstream and 6 km per hour downstream. c. the team traveled at 8 km per hour upstream and 20 km per hour downstream. d. the team traveled at 20 km per hour upstream and 8 km per hour downstream.

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Mathematics, 27.08.2019 17:00, 20jacksone

Jake went on a riverboat tour. after returning from the tour, he was curious to know the speed at which the boat was going. during the tour, he was told that he would travel 10 miles upstream and then 10 miles downstream. he also knows that the river was flowing at a rate of 3 miles/hour and that the tour took about three hours. the boat moved at a constant speed for the whole journey, although its actual speed varied with the current. jake wants to know the boat’s actual speed going upstream and actual speed coming downstream. if the boat was moving at a constant speed of x miles per hour, determine the boat’s relative speed in each direction. was the time it took the boat to go upstream the same as the time it took to come downstream? jake first reasoned that because the boat ride took 3 hours, it must have taken 1.5 hours to go upstream and 1.5 hours to go downstream. thinking about it further, however, he realized that the ride upstream had to take longer than the trip downstream. what is the reason it took longer to travel one direction than the other? the time it took the boat to go upstream is u, and the time it took to come downstream is d. what is u + d? type your response here: jake knows that the relationship between distance (d), velocity (v), and time taken (t) is given by d = vt. rewrite this equation for t. using the equation you rewrote in part e, write an equation for the time taken for the upstream trip. now construct an equation for the time taken for the downstream trip. jake already has the equation u + d = 3, which represents the total time taken for the whole journey. now that he has individual equations for u and d, he needs to combine these three equations to get a single equation. construct a combined equation for u + d in terms of x, the constant speed at which the boat was going. jake now has an equation with x as the only unknown variable. he needs to solve for x. transform the equation you found in part h into a quadratic equation, and find the value of x, the constant speed at which the boat traveled.

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