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vaieri [72.5K]
3 years ago
7

EXPERT HELP I'LL GIVE BRAINLIEST:

Mathematics
2 answers:
stich3 [128]3 years ago
8 0

Answer: 846 sq ft

Step-by-step explanation:

21 x 15 x 2= 630

3 x 15 x 2= 90

3 x 21 x 2= 126

846 sq ft

larisa [96]3 years ago
7 0

Answer:

C) 846 in^2

Step-by-step explanation:

(15x48) + (21x3x2) = 846

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the first one

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A piece of plywood was cut so it's length with 8 ft by 4 ft what is the area of the wood
Elena L [17]

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If 1200 cm2 of material is available to make a box with a square base and an open top, find the largest possible volume of the b
Colt1911 [192]

Answer:

The largest possible volume V is ;

V = l^2 × h

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Step-by-step explanation:

Given

Volume of a box = length × breadth × height= l×b×h

In this case the box have a square base. i.e l=b

Volume V = l^2 × h

The surface area of a square box

S = 2(lb+lh+bh)

S = 2(l^2 + lh + lh) since l=b

S = 2(l^2 + 2lh)

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S = l^2 + 4lh

And Surface Area of the box is 1200cm^2

1200 = l^2 + 4lh ....1

Making h the subject of formula

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Volume is given as

V = l^2 × h

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V = (1200l - l^3)/4

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dV/dl = (1200 - 3l^2)/4

dV/dl = (1200 - 3l^2)/4 = 0

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The largest possible volume V is ;

V = l^2 × h

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4 0
3 years ago
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-14+3=-11

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3 years ago
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