3 Tower cranes are a common fixture at any major

Last updated: 6/12/2023

3 Tower cranes are a common fixture at any major construction site They re pretty hard to miss They often rise hundreds of feet into the air and can reach out just as far The construction crew uses the tower crane to lift steel concrete large tools like acetylene torches and generators and a wide variety of other building materials A crane stands on a level ground It is represented by a tower AB of height 24 m and a jib BR The jib is of length 16 m and can rotate in a vertical plane about B A vertical cable RS carries a load S The diagram shows current position of the jib cable and load 24 m TRIST 16 m R 8 m S Now the jib BR has been rotated and the length RS is increased The load is now on the ground at a point 8 m from A What is the angle through which the jib has been rotated a 15 b 25 c 30 d 45 What is the length by which RS has been increased a 8 3 m b 8 3 2 m c 8 3 1 m d 4 3 2 m DEMY