NEED EXPLANATION PLEASE A hovercraft travels at 40 km / h over level ground and 10 km / h over a
choppy body of water. If the hovercraft took 5.75 hours to cover 185 km, how far
has he traveled on the ground and on the water?

9514 1404 393

Step-by-step explanation:

Let t represent the amount of time spent over level ground. Then 5.75-t is the time spent over water. The total distance covered is ...

  distance = speed · time

  40(t) + 10(5.75 -t) = 185

  30t + 57.5 = 185

  30t = 127.5

  t = 4.25

  40t = 170

  185 -170 = 15

The hovercraft covered 170 km on the ground and 15 km on the water.

ok

step-by-step explanation:

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you