Question
Ratio of speed of boat in downstream and speed of stream
is 8:3, if speed of current is 6 km/hr, then find distance travelled (in km) upstream in 5 hours.Solution
Let speed of downstream and speed of stream be 8x and 3x respectively. Speed of current => 3x = 6 => x = 2 km/hr Downstream speed = 8 × 2 = 16 km/h Speed of boat = 16 - 2 = 14 km/hr Upstream speed = 14 - 2 = 12 km/h Distance travelled upstream in 5 hr = 12 × 5 = 60 km
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