Posted by **SABRINA** on Monday, August 27, 2012 at 8:09am.

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?

- physics-please help -
**Damon**, Monday, August 27, 2012 at 8:11am
Now Sabrina,

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

- physics-please help -
**SABRINA**, Monday, August 27, 2012 at 8:35am
is it

D/5.8= 1.2/2.8

D= (5.8x1.2)/2.8

D= 2.48m

??

- physics-please help -
**SABRINA**, Monday, August 27, 2012 at 8:58am
can someone help? i am really struggling

- physics-please help -
**SABRINA**, Monday, August 27, 2012 at 9:18am
could i have a clue or a starting point please?

- physics-please help -
**Elena**, Monday, August 27, 2012 at 5:40pm
2.8/(3+x) = 1.2/x,

2.8• x =1.2•3+1.2•x,

x=3.6/1.6=2.25 m

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