![\"\"](\"/images/stars/stars-12.gif\")
You can put this solution on YOUR website!
D=RT and remember these problems often contain two situations. This one contains two situations.
\n" );
document.write( "1. D = rt where rate is r+8km/hr because it is moving with the current so the current adds to the speed. t = 2. Thus D=2(r+8)
\n" );
document.write( "2. The return trip was against the current, so the current works against the boat's speed (subtracts from it.) rate is r-8 and t=3. Thus D=3(r-8)
\r
\n" );
document.write( "\n" );
document.write( "3. Because the boat traveled the same distance each time, those two equations both equal the same D, and thus are both equal to each other.
\r
\n" );
document.write( "\n" );
document.write( "2(r+8)=3(r-8) (Multiply the numbers by each term in ().) 2r+16=3r-24
\n" );
document.write( "Subtract 2r from each side, add 24 to each side.
\n" );
document.write( "40=r.
\n" );
document.write( "The rate of the boat in still air (without any current working with or against it) is 40 km/hr.
\n" );
document.write( "
I provide online tutoring ($30/hr) and personal problem solving ($3.50-$5.50 per problem. Contact me (check the profile \"website\" which is my email address.
\n" );
document.write( "