369647 I.
The use of pillars of columns is very common in building and bridges.
II.
A pillar with rounded ends supports less load than that with a distributed shape at ends.
III.
Usually the pillars are madeup of iron structure filled with concrete.
Which of the following statements (s) is/are correct?

369648 Assertion :
Railway tracks are laid on largesized wooden sleepers.
Reason :
Small sized wooden sleepers are used so that rails exert more pressure on small area.

369649 Over bridges are constructed with steel but not with aluminium because steel is

369647 I.
The use of pillars of columns is very common in building and bridges.
II.
A pillar with rounded ends supports less load than that with a distributed shape at ends.
III.
Usually the pillars are madeup of iron structure filled with concrete.
Which of the following statements (s) is/are correct?

369648 Assertion :
Railway tracks are laid on largesized wooden sleepers.
Reason :
Small sized wooden sleepers are used so that rails exert more pressure on small area.

369649 Over bridges are constructed with steel but not with aluminium because steel is

369647 I.
The use of pillars of columns is very common in building and bridges.
II.
A pillar with rounded ends supports less load than that with a distributed shape at ends.
III.
Usually the pillars are madeup of iron structure filled with concrete.
Which of the following statements (s) is/are correct?

369648 Assertion :
Railway tracks are laid on largesized wooden sleepers.
Reason :
Small sized wooden sleepers are used so that rails exert more pressure on small area.

369649 Over bridges are constructed with steel but not with aluminium because steel is