NCERT Example 7 - Triangles
Question: A girl of height 90 cm is walking away from the base of a lamp-post at a speed of 1.2 m/s. If the lamp is 3.6 m above the ground, find the length of her shadow after 4 seconds. A B C D E 3.6 m 90 cm 4.8 m x Fig. 6.32
Answer: The shadow of the girl is 1.6 m long.
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