Speed Race Boat
Posted on | March 1, 2011 | 3 Comments
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Speed Race Boat
Can you help me with this word problem?
For the annual Breakwater Sailboat Race, sailboats start singly at 1 minute intervals. Boat B is scheduled to start immediately following Boat A. The captain of boat B feels that no matter how fast Boat A travels his boat can sail 1 km/h faster. What is the average speed of each boat if Boat B overtakes Boat A at the 1st buoy, 4km from the start?
My curriculum has nothing to teach me about how to solve this. I am stumped! Thanks for your help!
You know that distance = speed * time.
The problem seems confusing because the speeds are quoted in km per hour, the time in minutes.
Need to get everything in terms of minutes. Instead of thinking of boatA going A kph, think A/60 kpm. Time t is in minutes.
4 km = ( A/60 ) * t = ( ( A+1 ) / 60 ) * ( t -1)
after some manipulation, you get to
A^2 +A -240 = 0, where the only positive solution is A = 15
So A goes 15 kph for 16 minutes and B goes 16 kph for 15 minutes.
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| Radio Remote Control RC Micro RTR Racing Speed Boat | | | US $14.20 | 6d 23h 7m |
| 28" Wing Speed RC US Rocket Boat R/C Racing Ship Radio Control Electric Yacht | | | US $54.98 | 22d 10h 9m |
| RC Remote Control 36" Speed Xcyclone Racing Boat NEW | | | US $52.99 | 3d 13h 54m |
| SPEED STORM RADIO CONTROL R/C HYDRO RACING RC BOAT NEW | | | US $74.99 | 31m |
| Brand New Double Horse Balaenoptera Musculus 23 Inches High Speed RC Racing Boat | | 0 Bid | US $24.95 | 5h 29m |
| New Double Horse 28 Inches Blazingly Fast Victory EP Racing Speed RC Boat | | 0 Bid | US $37.95 | 14h 44m |
| 37" SPEED X CYCLONE RADIO CONTROL EP RC RACING BOAT NEW | | | US $79.95 | 16h 7m |
| RADIO CONTROL KILLER WHALE RACING RC BOAT - SUPER SPEED | | 0 Bid | US $24.99 | 16h 48m |
| Radio Remote Control RC Mini Micro Racing Speed Boat | | 0 Bid | US $15.00 | 19h 21m |
| 27" DUAL MOTOR REMOTE CONTROLLED RACING SPEED BOAT | | | US $50.00 | 1d 5h 19m |
| 29" DUAL MOTOR REMOTE CONTROLLED RACING SPEED BOAT | | | US $50.00 | 1d 6h 9m |
| New Century RC Racing Boat FM Radio Control Electric Speed Ship 30" Yacht | | | US $49.98 | 22d 11h 9m |
| 36" SPEED XCYCLONE RACING BOAT | | | US $66.00 | 1d 6h 43m |
| 37" Speed X-Cyclone 1/16 RC Racing Boat R/C Mosquito Raido Control Electric Ship | | | US $69.98 | 22d 17h 20m |
| Dumas Wooden 43 Inch Hydroplane Speed Race Boat with Engine String Control/RC? | | 1 Bid | US $119.99 | 1d 18h 46m |
| RC R/C Remote Control Mini Race Speed Boat Ship Red | | 7 Bids | US $4.25 | 1d 19h 35m |
| Syma Century Racing Boat 29" Power century speed boat b-ce | | | US $49.97 | 28d 23h 22m |
| 41" Falcon catamaran cat gas nitro speed race rc boat | | | US $148.00 | 16d 23h 37m |
| Red Radio Remote Control RC Mini Racing Speed Boat (HQ953-RD ) | | | US $10.00 | 17d 23h 40m |
| MINI REMOTE CONTROL RC SPEED RACING BOAT WATER TOY 4 COLOR | | | US $18.26 | 29d 38m |
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Tags: boats > qatar speed boat race > race > race boat > racing > rc > speed > speed boat race game > speed boat race key west > speed race > speed race boat > speed race boat 2
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3 Responses to “Speed Race Boat”
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March 28th, 2011 @ 5:42 pm
Chrysler was given away to Fiat for free because they consistently turned old Mercedes bases into rubbish cars and ran themselves to the ground. GM died as we all know. The american market was carried largely by the steady sales of pickups. When that died, that was their only leg to stand on. Regretably US cars have had quality for the last decades that made them impossible to sell abroad. Neme 1 GM today which is worth owning. They are selling ex korean shit with GM badge now.
November 9th, 2011 @ 7:47 pm
Fish cops? You're talking about game wardens, right? Go**amn.
I've never ran into a game warden like that here in California (most of them are pretty well educated on the fish and wildlife) but I sure as sh*t have run into rangers like that up at Casitas!
Looks like in the state Flori-DUHHH, the department of fish and game or department of natural resources or whatever you guys call it will hire any dumb schmuck right off the street.
Who do you complain to? The state of course! They're state employees.
January 4th, 2012 @ 12:52 am
Shine Runner – rednekov race boat