| Author: Shanthi M 20 Jun 2008 | Member Level: Diamond | Rating:  Points: 2 |
2. Let Rate upstream = x kmph and
Rate downstream = y kmph
(50/x)+(72/y)=9
(70/x)+(90/y)=12
Solving these 2 equations,
we get x=10 , y=18.
Rate of current = (1/2)(y-x)
= (1/2)(18-10)
= 4
Rate of current = 4 kmph
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| Author: Shanthi M 20 Jun 2008 | Member Level: Diamond | Rating: Points: 2 |
1. Total distance traveled = 3*60+5*24 = 300 miles
Total time = 3+5 = 8 hours
Average Speed = 300/8 = 37.5 mph
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| Author: Syed 21 Jun 2008 | Member Level: Diamond | Rating: Points: 2 |
Good Work Shanthi For the first Question
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| Author: Syed 21 Jun 2008 | Member Level: Diamond | Rating: Points: 2 |
Let x and y be the upstream and downstream speed respectively.
Hence 50/x + 72/y = 9 and 70/x + 90/y = 12
Solving for x and y we get
x = 10 km/hr and
y = 18 km/hr
We know that Speed of the stream = 1/2 * (downstream speed - upstream speed)
= 1/2 (18 – 10)
= 4 km/hr.
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| Author: Vidya 23 Jun 2008 | Member Level: Diamond | Rating: Points: 0 |
CORRECT ANSWER SHANTI
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| Author: prashantha karthik 24 Jun 2008 | Member Level: Silver | Rating: Points: 0 |
its 37.5 mph.. toyal 300 miles in 8 hours
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| Author: prashantha karthik 24 Jun 2008 | Member Level: Silver | Rating: Points: 0 |
its 37.5 mph.. total 300 miles in 8 hours
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