What is the value of y?
A. 50
B. 60
C. 30
D.40

The correct answer is D, y = 40

Step-by-step explanation: The first thing to note is the rule stating that sum of angles in a triangle equals 180 degrees. We have been given three angles which are, 2y, y+ 10 and 50.

If the sum of the angles in a triangle equals 180, then

2y + (y + 10) + 50 = 180

2y + y + 10 + 50 = 180

3y + 60 = 180

Subtract 60 from both sides of the equation

3y = 120

Divide both sides of the equation by 3

y = 40.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: