If 200 mL of water takes 20 minutes to percolate through soil, the percolation rate is:
A20 mL per minute
B200 mL per minute
C2 mL per minute
D10 mL per minute
Answer & Solution
Correct answer: D. 10 mL per minute
1. Rate equals water amount divided by time.
2. 200 divided by 20 is 10 mL per minute.
3. Sandy soil percolates fastest.
_Source: NCERT Class 7 Science, Chapter 9, Soil._
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