OpenStudy (anonymous):

A home has 3 stairs leading to its front door with each stair having a vertical height of 10 inches and a horizontal tread length of 18 inches. When a new refrigerator is delivered to the home, the delivery people lay down a wooden plank over the stairs so that they can roll the refrigerator up the plank. What angle, to the nearest degree, does the wooden plank form with the ground? 29* 61*

2 years ago
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