The normal duration and normal cost of an activity are 25 days and Rs. 50,000 respectively. The activity crash duration is 22 days. If the cost slope of the activity is Rs. 1,500 per day, what is the direct activity cost after crashing it fully by 3 days?

Walls of a room with dimensions 10 m × 10 m × 4 m need to be constructed using offsite prefabrication. The wall thickness is 150 mm. The truck used for transporting the prefabricated components from the manufacturing unit to the construction site has a volume of 15 m 3 with carriage dimensions of 4 m (Length) × 3 m (Width) × 3 m (Height). Determine the minimum number of cycles required by the loading truck to transport all the wall components to achieve the least transportation cost.

A scraper is to haul earth from a pit to a fill 0.4 km away. If it is working under average fixed-time conditions of 2.2 minutes, with an average haul speed of 7 km/h, and an operating factor of 0.8, the number of cycles which can effectively be performed per hour is nearly: