2. The respective ratio between the
speed of the boat upstream and
downstream is 2 : 3. What is the
speed of the boat in still water if
it covers 42 km, downstream in
2 hours 20 minutes ? (in km/h)
(A) 13.5 (B) 15
(C) 12
(D) 11
Answers
Answered by
0
Correct Answer:
D) 17.5
Description for Correct answer:
Rate downstream of boat = 4x kmph
Rate upstream of boat = 3x kmph
According to the question,
=> 704x=(3+3060) hours
=> 704x=312=72
=> 7×4x=70×2
=> x=70×27×4=5
∴ Speed of boat in still water =
12( Rate downstream+ Rate upstream)
= 12×7x=7×52
= 17.5 kmph
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Answer:
use photo nath or connect for correct answer
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