Bryant Lam Hong Sheng's answer to Jolyn Tan's Secondary 3 E Maths question.
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The reason why x cannot equal to 11.92 is because this would mean that the average speed of the coach is 11.92 - 30 = -18.08 km/h which is impossible. Hence, x must be greater than 30km/h so we accept only x = 88.08 km/h
Date Posted:
7 years ago
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