When i tried this questions i came up with 429J but not real

When i tried this questions i came up with 429J but not really sure how you get to the correct answer of 231 J

Problem 19.17 Part A You want to design an ideal Carnot heat engine that wastes only 35.0% of the heat that goes into it. The lowest cold-reservoir temperature available to you is 203 J 231J 760 J 429J 248 J Submit My Answers Give Up Incorrect; correct answer displayed

Solution

Tc = 15 deg C = 273 + 15 = 288 K

Work done = 150 J

efficiency = 1 - waste = 1 - 0.35 = 0.65

heat input, Q =?

efficiency = Wnet / Qin

0.65 = 150 / Qin

Qin = 230.77 J