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October 24, 2014

October 24, 2014

Posted by **SABRINA** on Monday, August 27, 2012 at 9:48am.

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?

- math -
**Reiny**, Monday, August 27, 2012 at 10:16ammake a sketch

let the length of the child's shadow be x m

from the similar triangles....

1.2/x = 2.8/(x+3)

2.8x = 1.2x + 3.6

1.6x = 3.6

x = 2.25

- math -
**SABRINA**, Monday, August 27, 2012 at 10:55amthanks for your help

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