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a. Sami is 50 cm away from a vertical mirror. He moves backwards by 20 cm. The distance between his image and the mirror becomes cm.
b. Sami is 50 cm away from a vertical mirror. He moves forward by 20 cm. The distance between his image and the mirror becomes cm.
c. Sami is 50 cm away from a vertical mirror. He moves backwards by 20 cm. The distance between his image and himself becomes cm.
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