The express train from addington to summit travels the 18 -mile route at an average speed of 72 mi./hr., stopping only in summit. the local train stops for 1.5 minutes at each of the 6 stops between these two locations, and it averages 54 mi./hr. while it is in motion. how many minutes more does the local train take for this trip than the express train?

{3 + i, 3 - i, 3, -1}

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.