HEEEEEEEEEEELPPPPPPPPP PLEASEEEEEEE URGENT 15 POINTS+ MORE
1 answer:
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Area of square is
We have hence
Hope this helps.
Answer:
Rs 8000
Step-by-step explanation:
Volume = Base area × Height
If we want to find the cost of carpeting a room, we need to find how much space there is to carpet, which would be the base area of the room.
240m³ = Base area × 3.6m
Base area = 240m³ ÷ 3.6m
Base area = 66m²
1m² --- Rs 120
66m² --- 66
× Rs 120 = Rs 8000
The explanation for this is one of my favorite pieces of mathematical reasoning. First, let's thing about distance; what's the shortest distance between two points? <em>A straight line</em>. If we just drew a straight line between A and B, though, we'd be missing a crucial element of the original problem: we also need to pass through a point on the line (the "river"). Here's where the mathemagic comes in.
If we take the point B and <em>reflect it over the line</em>, creating the point B' (see picture 1), we can draw a line straight from A to B' that passes through a point on the line. Notice the symmetry here; the distance from the intersection point to B' is<em> the same as its distance to B</em>. So, if we reflect that segment back up, we'll have a path to B, and because it came from of the line segment AB', we know that it's <em>the shortest possible distance that includes a point on the line</em>.
If we apply this same process to our picture, we see that the line segment AB' crosses the line at the point (1, 1)
