Experts please answer question number 18 with explanation. Kindly answer do not refer to similar query. Share with your friends Share 1 Shruti Tyagi answered this Dear Student, Given that there are two candles of same length let it be 12 cmThick candle and thin candle.Time taken by thick candle= 6 Hourshence candle consumed in 1 Hour=126⇒2 cmTime taken to complete thin candle=6-2 ⇒4 Candle consumed in 1 hour=124⇒3 cmLet the friends studied for y hours in candle light.Thick Candle consumed =2×yThin Candle consumed =3×yIt is given that thick candle is twice the thin candle after y hours12-2y=2×12-3y12-2y=24-6y6y-2y=24-124y=12y=3 Hence Ali and his friends studied for 3 Hours in candle light Regards, -1 View Full Answer