8. A motorboat covers a distance upstream in 6 hours and covers the same distance downstream in 5 ha
If 3 km/h is the speed of the water, then find the speed of the boat in still water.
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Answered by
36
A motorboat covers a distance upstream in 6 hours and covers the same distance downstream in 5 hours .If 3 km/h is the speed of the water, then find the speed of the boat in still water .
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Let the speed of th motorboat in still water be xkm/hr.
→Speed of the motorboat in downstream = x + 3
→Speed of the motorboat in upstream = x - 3
We know that,
Distance = Time × Speed
Distance is same.
→ 6(x - 3) = 5(x + 3)
→ 6x - 18 = 5x + 15
→ x = 33
Therefore the speed of th motorboat in still water is 33km/hr
Answered by
13
Answer:
Answer: 33/h.
Setp by setp explain.
let the speed of motor boat in still water.: X km/h.
speed of the motor boat in downstream : x +3.
speed of the motor boat in upstream: x -3
Distance= Time ×Speed.
so, the distance is same.
= 6(x-3)=5(x+3)
=6x-18=5x+15
=x=33.
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