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The speed of current is 5 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if one third of the distance covered going downstream in a certain time is equal to the distance covered going upstream in the same time. answer choices. 15 kmph, 5 kmph. Rate downstream of boat = 4x kmph Rate upstream of boat = 3x kmph According to the question, => \(\Large \frac{70}{4x} = (3 + \frac{30}{60}) \ hours \) => \(\Large \frac{70}{4x} = 3 \frac{1}{2} = \frac{7}{2} \) => \(\Large 7 \times 4x = 70 \times 2 \) => \(\Large x = \frac {70 \times 2}{7 \times 4} = 5 \) \(\Large \therefore \) Speed of boat in still water = \(\Large \frac{1}{2} (\ Rate \ downstream + \ Rate \ upstream . Jul 24, �� 1) Answer: c) Speed of downstream = D/T = 55/ (66/60) = 55* (60/66) = 50 km/hr. The ratio of the speed of the boat in still water to the speed of the stream. = > 4: 1 (4x, x) 5x = X = Speed of upstream = 4x � x = 3x = 30 km/hr. Distance = 72 km. Time = D/S = 72/30 = 2 2/5 hr = 2 hour 24 min.
The speed of the boat upstream is? A. km/hr. B. km/hr.� Then eventually, try on some problems. Then you can go ahead and take the Test. Well, the Quiz we are providing on this page is for free. Yes, you heard it right. So, what are waiting for?. upstream speed of boat = supstream = v - c. downstream speed of boat = sdownstream = v + c. Upstream data: d = 70 miles, t = hours. supstream = 70 miles/ hours = 70/ (miles/hr) = miles/hr. Downstream data: d = 70 miles, t = 5 hours. sdownstream = 70 miles/5 hours = 10/5 (miles/hr) = 14 miles/hr. a). With this, we arrive at the following equations for the upstream and downstream speeds of the boat: supstream: v - c = sdownstream: v + c = b). To solve for the speed of the current (c), first solve each equation for the speed of the boat in still water (v) in terms of c. What is the speed of the boat in still water? Ad by Forge of Empires. Can you solve this equation in under 20 seconds?� A boat can travel 36 km upstream in 5 hours the speed of the stream is kmph, how much time will the boat take to cover a distance of 78 km downstream? A motor boat covers a certain distance downstream in 30 minutes, while it comes back in 45 minutes. If the speed of the stream is 5 kmph, what is the speed of the boat in still water? Distance between a and b is 24km. A boat travels from a to b and comes back in 6 hours. The speed of boat in still water is thrice the speed of the stream. What is the speeds of the boat? Ranjan Karnad., former Retired Banker ().
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