Question

Mr. Joshi has $430$ cabbage-plants which he wants to plant out. Some $25$ to a row and the rest $20$ to a row. If there are to be $18$ rows in all how many rows of $25$ will there be?

• A. $10$
• B. $14$
• C. $8$
• D. $12$

Answer 1

Answer: (B)

$14$

Let '$x$' rows of $25$ and '$y$' rows of $20$.

Given, $25x+20y=430$

$5x+4y=86$ ....(1)

Also $x+y=18$ ....(2)

Multiply equation (1) by $4$, we get

$4x+4y=72$ ....(3)

Subtract equations (1) and (3), we get

$x=14$

Hence, answer is $14$.