math
posted by karin .
if you are 6 ft tall and cast a 90" shadow and are standing 70" from a lamp how tall is the lamp
someone helped with this earlier (steve) but I still don't understand how you got your answer...can you please explain further?

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
Respond to this Question
Similar Questions

math
A woman 5 ft tall is standing near a street lamp that is 12 ft tall. Find a function that models the length L of her shadow in terms of her distance d from the base of the lamp. 
Pre Calc
Dr. Black is standing 15 feet away from the street lamp. The lamp is making his shadow 8 feet long. The angle of elevation from the tip of the shadow to the tip of the streetlamp is 50 degrees. How tall is the streetlamp? 
math
A man is 6ft tall is standing 10 feet from the base of a lamp post. The mans shadow has a lenght of 4ft . How tal is he lamp post 
Math 8R  HELP!!!!!
Mr. Martanarie bought a new lamp and lamppost for his home. The pole was 6 5/8 ft tall and the lamp was 1 1/4 ft in height. How tall were the lamp and post together? 
math
if you are 6 ft tall and cast a 90" shadow and are standing 70" from a lamp how tall is the lamp 
math
if you are 6 ft tall and cast a 90" shadow and are standing 70" from a lamp how tall is the lamp 
Trig/Precalc
a lamp post that is 8 feet high casts a shadow 5 feet long. how tall is the person standing beside the lamp post if his shadow is 3.5 feet long 
calculus
A person 150cm tall is walking away from a lamp post at the rate of 15 meter per minute. when the man is 2.5m from the lamp post, his shadow is 3m long. Find the rate at which the length of the shadow is increasing when he is 7m from … 
math
A LAMP POST IS 10 FEET TALL AND CAST A SHADOW. THE DISTANCE FROM THE TOP OF THE LAMP POST TO THE TIP OF THE SHADOW IS 20 FEET. FIND THE ANGLE OF THE ELEVATION. 
sir steve damon reiny steve help maths
A street lamp is 6m above a straight road.A Man 2m tall.walks along the road away from the lamp at a constant speed of 1.5m/s.At what rate is his shadow lengthening?