To do this, divide the total square footage by its square root. The square root of 9 is 3. 9 divided by 3 is 3. All sides of the green square are 3 ft in length. The square root of 16 is 4. 16 divided by 4 is 4. All the sides of the red square are 4 ft in length.
You'll find it easier to understand if you illustrate the problem as what is shown in the attached picture. From the illustration and the problem description, two equations can be formulated:
HJ = 2JK
HJ + JK = HK
2JK + JK = 78
3JK = 78
JK = 78/3
JK = 26
Answer:
12
Step-by-step explanation:
divide 28 by 7 giving you 4 then multiple that by 3
6/x = 9/12
Cross multiply: 9x =6(12)
9x=72
Divide both sides by 9:
9x/9 = 72/9
X=8
Answer:
784000J or 784KJ
Step-by-step explanation:
Kinetic energy (KE) can be represented with the formula
KE = 1/2(MV²)
where
M = Mass of object (Kg) =2000kg
V = velocity or speed of object in metre per second (m/s or ms^-1) = 28m/s
therefore
KE = 1/2(mv²) becomes
KE = (1/2) X 2000 X 28 X 28
KE = 784000Joules