Answer:
20m
Step-by-step explanation:
4 x 5 = 20
therefore the 5 benches are 20m long
(3*4)*4 - 4 rectangles 3 by 4, and (4*4)*2 - 2 squares 4 by 4
altogether
(3*4)*4+(4*4)*2=12*4+16*2=48+32=80
The formula to find the surface area is 3.14(radius)(slant) + 3.14 (radius squared). So the equation would be (3.14)(5)(8)+(3.14)(5^2) for your answer you should get 204 square inches. Hope that helped!
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