What’s the correct answer for this question?

4 weeks = 672 hours

672 hours

Step-by-step explanation:

In a day, there are 24 hours.

In 4 weeks, there are 28 days

24 x 28= 672 hours altogether

hope this helps!

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐