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4. Assertion (A): Terrace cultivation does not
restrict erosion.
Reason (R): Running water cuts through
the clayey soils and makes deep channels
and gullies. This helps to cultivate crops.
Options:
(a) Both A and R are true and R is the
is the
correct explanations of A.
(6) Both A and R are true but R is not
the correct explanations of A.
(c. A is correct but R is wrong.
(d) A is wrong but R is correct.
Answers
Answered by
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Answer:
According to Pythagoras theorem in ∆PRM
PM²= PR²+ RM²
RM²=PM²-PR²
In ∆PRQ
PR²= RQ²+PQ²
PQ²= PR ²+ (RM+MQ)²
PQ²= PR ²+ (RM+RM)²
PQ²= PR ²+ (2RM)²
PQ²= PR ²+ (4RM)²
PQ²= PR ²+ 4(PM²-PR²)
PQ²= PR ²+ 4PM²- 4PR²
PQ²= 4PM²- 3PR²
Explanation:
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