1.

A green grocer earns a profit of ₹ 7 per kg of tomato and got loss of ₹ 4 per kg of brinjal by selling. On Monday he gets neither profit nor loss, if he sold 68 kgs of tomato. How many kgs of brinjal did he sell ?

Answer»

Given profit per kg of tomato = ₹ 7 

Loss per kg of brinjal = ₹ 4 

Weight of tomatoes sold = 68 kgs 

Let number of kgs of tomato be x kg. 

Number of kgs of brinjals be y kg. 

7x – 4y = 0 

7 × 68 – 4y = 0

– 4y = – 7 × 68

y = -7 x 68/-4

∴ Weight of brinjals sold = + 7 × 17 

= + 119 kgs.



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