JEE Main & Advanced
Mathematics
Trigonometric Equations
Question Bank
Height and Distance
question_answer
A ladder 5 metre long leans against a vertical wall. The bottom of the ladder is 3 metre from the wall. If the bottom of the ladder is pulled 1 metre farther from the wall, how much does the top of the ladder slide down the wall [AMU 2000]
A)1 m
B)7 m
C)2 m
D)None of these
Correct Answer:
A
Solution :
From first case, From second case, \[\therefore \,\,AD=4-3=1m.\]