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प्रश्न
Tennis balls are of hollow rubber with a felt coating. Traditionally white, the predominant color was gradually changed to ______.
रिकाम्या जागा भरा
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उत्तर
Tennis balls are of hollow rubber with a felt coating. Traditionally white, the predominant color was gradually changed to optic yellow.
Explanation:
Tennis balls became predominantly optic yellow in the latter part of the twentieth century. The change made the ball easier to see.
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