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Sagot :
e. 400s
Solution:
Note: Velocity = Distance/Time
Velocity is ADDED when both the flow of the river and the direction of the boat are the same. Boat is going DOWNSTREAM in this case.
When boat is going downstream:
V₁ + V₂ = Distance/Time
Time = Distance / (V₁ + V₂)
= 3000 meters / ( 20 m/s + 10 m/s)
= 3000/30
Time = 100 seconds ....Time going DOWNSTREAM.
Velocity is SUBTRACTED when both the flow of the river and the direction of the boat are the NOT the same. Boat is going UPSTREAM in this case.
When boat is going upstream:
V₁ - V₂ = Distance/Time
Time = Distance / ( V₁ ₋ V₂ )
= 3000 meters / ( 20 m/s - 10 m/s)
= 3000/10
Time = 300 seconds ........Time going UPSTREAM.
Therefore total time = time downstream + time upstream
= 100 s + 30 s
Round-trip Time = 400 seconds ........ANSWER
Solution:
Note: Velocity = Distance/Time
Velocity is ADDED when both the flow of the river and the direction of the boat are the same. Boat is going DOWNSTREAM in this case.
When boat is going downstream:
V₁ + V₂ = Distance/Time
Time = Distance / (V₁ + V₂)
= 3000 meters / ( 20 m/s + 10 m/s)
= 3000/30
Time = 100 seconds ....Time going DOWNSTREAM.
Velocity is SUBTRACTED when both the flow of the river and the direction of the boat are the NOT the same. Boat is going UPSTREAM in this case.
When boat is going upstream:
V₁ - V₂ = Distance/Time
Time = Distance / ( V₁ ₋ V₂ )
= 3000 meters / ( 20 m/s - 10 m/s)
= 3000/10
Time = 300 seconds ........Time going UPSTREAM.
Therefore total time = time downstream + time upstream
= 100 s + 30 s
Round-trip Time = 400 seconds ........ANSWER
Salamat sa iyong pagbisita. Kami ay nakatuon sa pagtulong sa iyong makahanap ng impormasyon na kailangan mo, anumang oras na kailangan mo ito. Umaasa kami na nakatulong ito. Mangyaring bumalik kapag kailangan mo ng higit pang impormasyon o mga sagot sa iyong mga katanungan. Ipinagmamalaki naming magbigay ng sagot dito sa Imhr.ca. Bisitahin muli kami para sa mas marami pang impormasyon.