Ruler

Peter is looking at John over a ruler that keeps at an arm's distance of 60 cm from the eye, and on the ruler, John measured the height of 15 mm. John is 2 meters high. How far from Peter stands John?

Correct answer:

x =  80 m

Step-by-step explanation:


x / 2 = 0.60 / 0.015

x = 80


x = 80/1 = 80

x = 80

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