plz help me and answer this as quickly as possible plzzzzzz
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Answer:
6.(a) 50.
(b) 30
(c) 50
(d) 7.5
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Step-by-step explanation:
at the speed of light by any smooth surface is called reflection of light by any smooth surface is called reflection of light by any smooth surface is called reflection of light by any smooth surface is called reflection of light by
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