A girl height 120 cm is walking away from the base of a lamp - post at a speed of 1.2 m/s. If lamp is 4.8m above the ground level, then find the length of her shadow after 6 seconds
Answers
Given :
A girl height 120 cm
post at a speed of 1.2 m/s
the lamp is 4.8m above the ground level
To Find :
find the length of her shadow after 6 seconds
Solution :
The height of girl = 120 = 1.2 m
height of the lamp = 4.8 m
Let the shadow length = x
distance traveled by the girl in 6 second = 1.2 x 6 = 7.2
from the properties of similar triangle;
1.2/ 4.8 = x/(x=7.2)
1.2/4.8 = x/ ( x+ 7.2 )
0.25 = x/ (x+7.2)
0.25
Hence the length of the shadow will be 0.25 m
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Answer:
Given :
A girl height 120 cm
post at a speed of 1.2 m/s
the lamp is 4.8m above the ground level
To Find :
find the length of her shadow after 6 seconds
Solution :
The height of girl = 120 = 1.2 m
height of the lamp = 4.8 m
Let the shadow length = x
distance traveled by the girl in 6 second = 1.2 x 6 = 7.2
from the properties of similar triangle;
1.2/ 4.8 = x/(x=7.2)
1.2/4.8 = x/ ( x+ 7.2 )
0.25 = x/ (x+7.2)
0.25
Hence the length of the shadow will be 0.25 m