Mrs lim used 3/7 of 35litre of water to wash dishes. she used 1/4 of the remaining amount of water to water some flowers. how much was there left

After dishes=4/7•35=20 (dishes used 3/7, 7/7-3/7=4/7 unused)

After flowers=3/4•20=15 (flowers used 1/4, 4/4-1/4=3/4 unused)

15L of water left

answer: options?

step-by-step explanation:

< 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⭐