CBSE Class 10-Mathematics: Chapter – 3 Pair of Linear Equation in Two Variables Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)
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Like the Crest of a Peacock So is Mathematics at the Head of All Knowledge
Questions 1:
At a certain time in a deer park, the number of heads and the number of legs of deer and human visitors were counted, and it was found there were heads & 132 legs. Find the number of deer and human visitors in the park.
Answer:
Let the no. of deer՚s be
And no. of humans be y
ASQ:
Multiply (1) and (2)
On solving, we get …
Question 2:
Solve for
(a)
Answer:
On solving, we will get … .
On solving, we will get …
(b)
Answer:
Form (1)
On solving we will get …
From (2)
On solving we will get …
Substitute this, to get and
(c)
Answer:
We get
Solve this, to get
Similarly, we can solve for
d.
Answer:
On solving, we get …
(e) .
Answer:
Let be a and be b
On solving, we get … .
From (1)
(f) If
Answer:
On dividing by , we get
(g)
Answer:
And the two equations:
Solve it, to get …
Subtract:
Solve it, to get …
From (1) and (2)
On solving we get … .