QUESTION $5[20$ MARKS$]$

a$)$ Industrialised Building System $($IBS$)$ is known as a modern method to improves the conventional construction method. Define IBS and explain four $(4)$ advantages of applying this system.

$[10$ Marks$]$

b$)$ A $4m^3$ shovel cost RM $127$ per hour including the wages to an operator. It is assumed to excavate dry clay under the following stated condition. The maximum digging height of the machine is $10\mathrm{.}7$ m $.$ Determine the cost per cubic meter.

Total cycle time are $23$ second

Height of excavation is $3\mathrm{.}1$ m

Angle of swing is $60$ degrees

Efficiency factor $45$ min $-$hr

$[10$ Marks$]$