Construction Management - Engineering

Q1:

If D is the duration, ES and EF are the earliest start and finish, LS and LF are latest start and latest finish time, then the following relation holds good

A EF = ES + D

B LS = LF - D

C LF = LS + D

D D = EF - ES

E all the above.

ANS:E - all the above.

Duration, D=Early finish- early start or D = LF - LS.
Option A is same to D.
B and C are same.
So E is the correct answer.