Question

a) An iron rod 5m long is placed against
the wall in such a way that the foot of
the rod is 3m away from the wall. Find
how high the top of the iron rod reaches
to the wall ?​

Answer 1

Answer:

4m

Step-by-step explanation:

since the wall will be perpendicular to the ground, therefore the ground and the wall will be making an angle of 90°

by Pythagoras theorem,

(5)²= (3)² + (h of wall)²

25= 9 + (h of wall)²

25-9=(h of wall)²

16=(h of wall)²

√16= h of wall

4= h of wall

height of wall is 4m