1) In a garden, there are some rows and columns. The number of trees in
a row is greater than that in each column by 10. Find the number one
in each row, if the total number of trees are 200.
Answers
Answered by
2
Answer:
Step-by-step explanation:
Here,
Let x be the number of trees in each row
And y be the number of trees in each column.
As per the question,
xy=200 .......(1)
And
x = y +10 .........(2)
Substituting (2) in (1)
We get,
xy=200
(y+10)y=200
y²+10y=200
By factorisation method,
y²+10y=200
y²+10y-200=0
y²+20y-10y-200=0
y(y+20)-10(y+20)=0
(y-10)(y+20)=0
y-10=0 or y+20=0
y = +10 or y = -20
Negative number will not be considered.
So,
When y=10
x=y+10
=10+10
x=20
The number of trees in each row is 20trees.
Done!!
Similar questions