The surface area is 870 cm².
Since the base is a regular quadrilateral, each side is the same; dividing the perimeter by 4 will give us the side length:
60/4 = 15
To find the area, we square the side length:
15² = 225
There are two bases, so the area of these is 2(225) = 450
There are 4 lateral faces, so the lateral area is 4(105) = 420
Together, this gives us a total surface area of 870.
Answer: the answer is 15m + 35
Step-by-step explanation:
3.4 = -13.6 - 3.4c + 1.7c
3.4 = -13.6 - 1.7c
1.7c = -13.6 - 3.4
1.7c = 17
c = 10
There is 140% increase.
Step-by-step explanation:
Given,
10 gallons to 24 gallons
Old value = 10 gallons
New value = 24 gallons
Change = New value - Old value
Change = 24 - 10 = +14
The positive sign indicates the increase.
Percent increase = 
Percent increase = 
Percent increase = 140%
There is 140% increase.
Keywords: percentage, increase
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