CBSE Class 10-Mathematics: Chapter –3 Pair of Linear Equation in Two Variables Part 21

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Question 24:

On selling a T.V. at gain and a fridge at gain shop keeper gains Rs . But if he sells the T.V at gain and the Fridge at loss, he gains on the transaction. Find the actual Price of TV and Fridge.

Answer:

Let the selling price of TV Rs

And fridge

According to question,

And

On solving eq. (i) and (ii), we get,

Question 25:

A taken 3 hours more than B to walk a distance of . But if A doubles his speed, he is ahead of B by hours. Find their original speed.

Answer:

Let the original speed of A and B are and respectively.

According to question,

Or

Or

And

On adding (i) and (ii), we get,

Or

And