Question
A boat covers a distance of 132 km downstream in 6
hours. If the ratio of upstream speed to downstream speed of the boat is 4:11, then find the distance travelled by the boat in upstream in 9 hours.Solution
ATQ, Let the upstream and downstream speed of the boat be '4x' km/hr and '11x' km/hr, respectively. ATQ, 11x = (132/6) So, 'x' = 2 So, upstream speed of the boat = 4x = 4 × 2 = 8 km/hr Required distance = 8 × 9 = 72 km
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