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JAMB Mathematics 2013 Objective — Question 26

Question 26 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2013 Objective paper, with the correct answer and a full explanation.

If the angles of a quadrilateral are (3y+10)°, (2y+30)°, (y+20)° and 4y°, find the value of y.

A. A. 66°
B. B. 12°
C. C. 30°Correct
D. D. 42°

Explanation

(3y+10)+(2y+30)+(y+20)+4y=360; 10y+60=360; y=30.

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