NEW! CBSE 2020 Sample Papers : ClassX, ClassXII
Download Class X : HOTS Question Answers: Math Unit  3 (Pair of linear equations)
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Class X : HOTS Question Answers: Math Unit  3 (Pair of linear equations)
Pair of linear equations

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 39 heads & 132 legs. Find the number of deer and human visitors in the park.

Find the value of p and q for which the system of equations represent coincident lines
 2x +3y = 7, (p+q+1)x +(p+2q+2)y = 4(p+q)+1
 Students are made to stand in rows. If one student is extra in a row there would be 2 rows less. If one student is less in a row there would be 3 rows more. Find the number of students in the class.

The larger of two supplementary angles exceeds the smaller by 180, find them.

A train covered a certain distance at a uniform speed. If the train would have been 6km/hr faster, it would have taken 4hours less than the scheduled time. And if the train were slower by 6km/hr, it would have taken 6 hours more than the scheduled time. Find the distance of the journey.

A chemist has one solution which is 50% acid and a second which is 25% acid. How much of each should be mixed to make 10 liters of 40% acid solution.
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