Answer:
The correct answer is 15 cm.
Step-by-step explanation:
Let the width of the required poster be a cm.
We need to have a 6 cm margin at the top and a 4 cm margin at the bottom. Thus total margin combining top and bottom is 10 cm.
Similarly total margin combining both the sides is (4+4=) 8 cm.
So the required printing area of the poster is given by {( a-10 ) × ( a - 8) } 
This area is equal to 125
as per as the given problem.
∴ (a - 10) × (a - 8) = 125
⇒
- 18 a +80 -125 =0
⇒
- 18 a -45 = 0
⇒ (a-15) (a-3) = 0
By law of trichotomy the possible values of a are 15 and 3.
But a=3 is absurd as a
4.
Thus the required answer is 15 cm.
Answer:
20% mark up
Step-by-step explanation:
[(48-40)/40]×100%= 20%
For perimeter you just add the sides up, so 15+12+9 which = 36
Answer:

Step-by-step explanation:
we have

Multiply by
both sides


Adds
both sides


Answer:
The answer is right - male - 63 Left - male - 5
left - female - 7 right - female - 34
Step-by-step explanation:
68 -63 = 5
12 - 5 = 7
109 - 96 = 13