MatteBlack5490
16.05.2021 •
Mathematics
48. Combining Forces Juana and Diego Gonzales, ages six
and four respectively, own a strong and stubborn puppy named
Corporal. It is so hard to take Corporal for a walk that they
devise a scheme to use two leashes. If Juana and Diego pull with
forces of 23 lb and 27 lb at the angles shown in the figure, how
hard is Corporal pulling if the puppy holds the children at a
standstill?
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Ответ:
C. 120 m²
Step-by-step explanation:
The surface area is equal to the area of 4 rectangles + area of 4 triangles + area of base.
Area of 4 rectangles:
4(5 × 4)
4(20) = 80
Area of 4 triangles:
4(3 × 4 × 1/2)
4(6) = 24
Area of base:
4² = 16
Add the areas.
16 + 24 + 80
= 120
The surface area of the composite solid is 120 m².