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YOU ARE THE GREATEST OF ALL TIME IF U HELP ME two planes leave Atlanta at 3pm est. one flies east and travels at a speed of 75 kilometers per hour slower than the other plane witch is flying west. by 7 pm est , the planes are 5460 kilometers apart. what is the speed of the plane flying east?

A. 645 km/h b. 683km/h c. 720 km/h d . 1440 km/h

Respuesta :

musiclover10045

speed of plane flying east = x

speed of plane flying west = x+75

 total speed = 2x+75

distance after 4 hours ( 7-3) = 8x+300

8x+300 = 5460

8x = 5160

x = 5160/8 = 645

 speed of plane flying east = 645 km/h

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