Step 1
find the a<span>rea of the first cross section
area1=b1*h/2
b1=8 m
h=10 m
area1=6*10/2------> 30 m</span>²
step 2
find the area of the second cross section
area 2=b2*h/2
b2=12 m
h=10 m
area1=12*10/2------> 60 m²
step 3
find <span>the difference in the areas of the cross sections
</span>difference=60-30------> 30 m²
the answer is
30 m²
Tons needed to unload a freight train= 21×2.5 =52.5
number of 3.5-ton payload trucks needed to unload a freight train=52.5÷3.5 = 15
15 Trucks , Each With A 3.5-Ton Payloaf , Would be Needed To Do The Same Job.
Answer:
x ≈ 8.1 units
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan72° = = ( multiply both sides by x )
x × tan72° = 25 ( divide both sides by tan72° )
x = ≈ 8.1 ( to the nearest tenth )
Multiply the numerator by numberator and denominator by denominator.
a/b multiplied by c/d is ac / bd.