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Walking at a speed of 10 kmph, Sheldon reaches his university 10 minutes late. If he walks at 20 kmph, he reaches 5 minutes early.

By Ivy

Walking at a speed of 10 kmph, Sheldon reaches his university 10 minutes late. If he walks at 20 kmph, he reaches 5 minutes early. How far is his university?​

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Ivy

1.
Biotic environment includes-
only the producers and the consumers
only the consumers and decomposers
only t

gravity is a ______ force (a)contact (b) non contact (c) both (d) none​

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