posted by .

A child of height 1.2 metres stands 3 metres from the foot of a lamp post of height 2.8 metres, at the top of which there is a small source which can be considered as a point. What is the length of the shadow cast by the child upon the ground?

Now Sabrina,
We did the previous problem for you. It is very similar to this problem. Please try it. It is really just trig.

is it
D/5.8= 1.2/2.8
D= (5.8x1.2)/2.8
D= 2.48m
??

can someone help? i am really struggling

could i have a clue or a starting point please?

2.8/(3+x) = 1.2/x,
2.8• x =1.2•3+1.2•x,
x=3.6/1.6=2.25 m

## Similar Questions

1. ### equation

A fox and an eagle lived at the top of a cliff of height 6m, whose base was at a distance of y metres from a point A on the ground. The fox descends the cliff and went straight to the point A. The eagle flew vertically up to a height …

Evan is 1.8 metres tall. He walks between two lampposts that are 5 metres apart and notices his shadow from one of the lampposts just touches the base of the other. He also notices that the ratio of his height to the height of the …
3. ### Math

A stunt pilot is testing a new plane. The equation that models his height over time is f(x)=15x^2 -195x +950, where x is his the time in seconds and (fx) is his height in metres. Determine when the pilot is below 500 metres. Do i sub …
4. ### Math

A stunt pilot is testing a new plane. The equation that models his height over time is f(x)=15x^2 -195x +950, where x is his the time in seconds and (fx) is his height in metres. Determine when the pilot is below 500 metres. Do i sub …
5. ### maths

the height of a tower is 20 metres and the length of its shadow is 25 metres.what will be the heigth of the tower if its shadow is 75 metres at the same time.
6. ### math

Need help..... A child of height 1.2 metres stands 3 metres from the foot of a lamp post of height 2.8 metres, at the top of which there is a small source which can be considered as a point. What is the length of the shadow cast by …
7. ### math

a rock is thrown straight up in the air from an initial height of ho, in metres, with the initial velocity vo, in metres per second. The height in metres above the ground after t seconds is given by h(t) = -4.9t^2 + vo + ho. Find an …
8. ### mathematics

The angle of elevation of the top of a radio mast from a point 53 metres from its base on level ground is 61 degrees.What is the height of the mast to the nearest 5 metres
9. ### Math

The slant height of 36 cubic a cone remains constant at 6 metres. If the radius is increasing at 5 metres per second how is the volume changing when the radius is 3 metres?
10. ### math

The bottom of a ladder is on horizontal ground. The top of a ladder is leaning against a vertical wall. Diagram: right angle triangle labelled height is h metres, bottom of triangle is labelled d metres and in between the labelled …

More Similar Questions