Question
The ratio of the speed of the boat in upstream to that
of in downstream is 5:9, respectively. If the speed of the current is 7 km/h, then find the speed of the boat in still water.Solution
According to the question: Let the speed of the boat in still water = x km/h Speed of the boat downstream = (x+7) km/h Speed of the boat upstream = (x−7) km/h ATQ, (x−7):(x+7)=5:9 9(x−7)=5(x+7) 9x−63=5x+35 9x−5x=35+63 4x=98 x=24.5 km/h
More Boats and streams Questions
√1764 + 35 × 8 + 39 = ?2
18% of 200 - 16% of 150 = ?
25% of 30% of 3/5 of 14500 =?
2(1/3) + 2(5/6) – 1(1/2) = ? – 6(1/6)
7/3 of 4/5 of 15/56 of ? = 83
What will come in place of the question mark (?) in the following expression?
40% of 150 – ?% of 80 = 25% of 400
555.05 + 55.50 + 5.55 + 5 +0.55 = ?
64.5% of 800 + 36.4% of 1500 = (?)² + 38
What will come in the place of question mark (?) in the given expression?
25% of 1280 + (41 × 4) = ?2
Simplify the following expression:
((32)4 - 1)/33×31× (210+1)
