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If a 5 ft post cast a shadow of 1.2 ft find the length of the shadow for a 17 ft post?
Wiki User
∙ 14y ago
The length of the shadow is proportional to the height of the post. Thus, if l is the length of the unknown shadow, l/17 = 1.2/5 or l = 4.1 feet. This should be rounded to 4 if the value 5 is not considered to be known to at least two significant digits.
Wiki User
∙ 14y ago
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A tree casts a shadow that is 21 feet long at the same time as a fence post casts a shadow that is 6 feet long The fence post is 4 feet tall What is the height of the tree?
Ratio of object to its shadow is the same. So if T is the height of the tree, then T/21 = 4/6 So T = 21*4/6 = 84/6 = 14 feet
At 10 am the shadow of a post on a pergola is 12 feet long At the same time the shadow of Jimmy who is 6 feet tall is 7 feet long What is the approximate height of the post?
10 ft 3.5 in (to the nearest half inch). There are two similar triangles: The shadows corresponds to one side and have the ratio of 7 : 12 (Jimmy : pole) = 7/7 : 12/7 = 1 : 12/7 So for every 1 of Jimmy's shadow, the pole's shadow is 12/7. The heights are in the same ratio, thus: The height of the pole is 6 x 12/7 ft = 72/7 ft = 10 2/7 ft ≈ 10.29 ft ≈ 10 ft 3.5 in (to the nearest half inch)
What is an addition to the end called?
PS.....Post script adendum
Who founded the first trading post?
David Niemeyer and Garrett Gresham
A squirrel goes spirally up a cylindrical post making a circuit in each 4 feet how many feet does it travel if the post is 16 feet high and 3 feet in circumference?
12 feet
At any given time of the day the ratio of an object the length of its shadow is the same for all objects if a 5ft post casts a shadow of a 1.2ft find the length for a 17ft post?
Let the length of the shadow be x and use the tangent ratio: 5/1.2 = 17/x Make x the subject of the equation: x = (17*1.2)/5 x = 4.08 feet
How does a shadow change in the day?
The shadow of a solid object is cast by the Sun on the ground. As the Sun appears to cross the sky between dawn and dusk, so the length of the shadow also changes, both in direction and in length on the ground.Put a wooden post a metre high in open ground on a sunny day. Use a watch, and every hour place a small rock where the end of the post's shadow is on the ground. Eventually, you will see by the position of the rocks, just how the shadow of the post changes during the day.
Why does the length and position of my shadow change as i walk towards a lamp post and when we walk away from the lamp post?
The lower the sun in the sky, the longer the shadow. A shadow is always cast in the opposite direction of incident sunlight. When the sun is directly overhead (at noon) the shadow is shortest.
Thomas happened to notice that like at 4 oclock pm on his unlces farm a fence post that was 5 ft tall cast a 2 foot shadow he also noticed that a nearby tree cast a 10 foot shadow how tall is the tree?
The ratio of the shadow cast to the height of an object will be the same at the same time of day. For the fence post, the height of the post is 2.5 times the length of the shadow ( 5 ft / 2 ft = 2.5 ) The tree has a 10 foot shadow, so using the same ratio for the fence post: 10 ft * 2.5 = 25 feet. The tree is 25 feet tall
What causes the length of the tree's shadow to change over the months?
The amount of sunshine, where the sun is, and if there is any sun at all. The angle of the light hitting the tree if the sun is high in the sky the Shadow is short for example if the sun is directly over a post then the post will cast no shadow. as the sun moves into a position that causes its light to shine on the side of the post a shadow will appear on the opposite side of the post where it blocks the sun. as the sun seems to assume a relatively lower position compared to the horizon it will make the shadow longer and longer.
How high is a tree that cast a 25 ft shadow at the same time a 9 ft post cast a shadow which is 4 ft long?
56.25 feet
Why the length and position of my shadow changes as i walk towards a lamp post and when i walk away from the lamp post?
Because - the angle of the lamp in relation to your body changes,
Why does the length and position of my shadow change as I walk towards a lamp post and when I walk away from the lamp post?
Because - the angle of the lamp in relation to your body changes,
Why shadows exist?
A shadow is cast when sunlight is blocked by a solid object - a person, a post, etc.
Thomas happened to notice that at 400 PM on his uncle's farm a fence post that was 5 feet tall cast a 3 foot shadow He also noticed that a nearby tree cast a 12 foot shadow How tall is the tree?
I think this question is about similar shapes. To answer this divide the height of the tree, 5ft, by the shadow cast by it, 3 ft. This will give you the scale factor. To then find the answer, times the scale factor by the shawdow cast by the nearby tree, and will find your answer in ft. Hope this helped.
A tree cast a 24-foot shadow at the same time a fence post 5 feet high cast a 4-foot shadow how tall is the tree?
It works out as 30 feet in height
Why when the length and position of my shadow changes as i walk towards a light source and when i walk away from the lamp post?
If the direction from which the light comes changes, then the direction of the shadow changes as well. The shadow basically points away from the light source.
