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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
Pinahahalagahan namin ang iyong oras. Mangyaring bumalik muli para sa higit pang maaasahang mga sagot sa anumang mga tanong na mayroon ka. Pinahahalagahan namin ang iyong pagbisita. Lagi kaming narito upang mag-alok ng tumpak at maaasahang mga sagot. Bumalik anumang oras. Imhr.ca ay nandito upang magbigay ng tamang sagot sa iyong mga katanungan. Bumalik muli para sa higit pang impormasyon.