Posted by **karin** on Sunday, November 4, 2012 at 1:20am.

if you are 6 ft tall and cast a 90" shadow and are standing 70" from a lamp how tall is the lamp

- math -
**Steve**, Sunday, November 4, 2012 at 1:39am
since 6' = 72 inches, if the lamp is x inches tall,

x/(70+90) = 72/90

x = 128

- math -
**karin**, Sunday, November 4, 2012 at 2:01am
can you further explain the part where you stated...

x/(70+90)=72/90

when I take 72/90 I get .8

I must be missing something here...

- math -
**Steve**, Sunday, November 4, 2012 at 2:50am
draw a diagram. Two ratios are the same

lamp height:distance to shadow tip

person height:length of shadow

so,

x/160 = .8

x = 128

## Answer this Question

## Related Questions

- math - if you are 6 ft tall and cast a 90" shadow and are standing 70" from a ...
- math - if you are 6 ft tall and cast a 90" shadow and are standing 70" from a ...
- math - A woman 5 ft tall is standing near a street lamp that is 12 ft tall. Find...
- math - A LAMP POST IS 10 FEET TALL AND CAST A SHADOW. THE DISTANCE FROM THE TOP ...
- Math 8R - HELP!!!!! - Mr. Martanarie bought a new lamp and lamppost for his home...
- math - A man is 6ft tall is standing 10 feet from the base of a lamp post. The ...
- calculus - A person 150cm tall is walking away from a lamp post at the rate of ...
- Pre Calc - Dr. Black is standing 15 feet away from the street lamp. The lamp is ...
- Trig/Precalc - a lamp post that is 8 feet high casts a shadow 5 feet long. how ...
- physics - A lamp which is 9.0 cm tall is in front of a concave mirror which has ...

More Related Questions