The values of three angles at a point are 3y - 45^o, y + 25^o and y^o . Find the value of y.

A.

40^o

B.

58^o

C.

68^o

D.

76^o

View answer & explanation

Correct answer is D

(3y - 450 + (y + 25) + t = 360^o(angles at a point)

3y - 45 + y + 25 + y = 360

5y = 360 + 20

5y = 380

y = \(\frac{380}{5}\)

= 76^o

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