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Class 12 Tuition > Learn Class XI-XII Tuition (PUC) > A boat running upstream takes 8 hours 48 minutes to...
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A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively? A. 2 : 1 B. 3 : 2 C. 8 : 3 D. Cannot be determined

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Let the man's rate upstream be x kmph and that downstream be y kmph. Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs. x x 8 4 = (y x 4) 5 44 x =4y 5 y = 11 x. 5 Required ratio = y + x : y - x 2 2 = 16x x 1 : 6x x 1 5 2 5 2 = 8 : 3 5 5 ...
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Let the man's rate upstream be x kmph and that downstream be y kmph. Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs. x x 8 4 = (y x 4) 5 44 x =4y 5 y = 11 x. 5 Required ratio = y + x : y - x 2 2 = 16x x 1 : 6x x 1 5 2 5 2 = 8 : 3 5 5 = 8 : 3. read less
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The correct answer is C. 8:3
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Answer: C. 8:3 Solution: Speed of the upstream = speed of the boat - speed of the water current Speed of the down speed = speed of the boat + speed of the water current. Let speed of the boat be x and speed of the water current be y. up speed = x-y down speed = x+y up words distance = down words...
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Answer: C. 8:3 Solution: Speed of the upstream = speed of the boat - speed of the water current Speed of the down speed = speed of the boat + speed of the water current. Let speed of the boat be x and speed of the water current be y. up speed = x-y down speed = x+y up words distance = down words distance (8+48/60)(x-y) = 4(x+y) (44/5)(x-y) = 4(x+y) 44x-44y = 20x+20y 24x= 64y x/y = 64/24=8/3 x:y = 8:3 spped of the boat : speed of the water current = 8:3 read less
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