An 18m3 dump truck is purchased at a cost of 1.3 million birr, with an estimated salvage value of 500000birr. It is established that the truck will serve at least 5 years. Prepare a depreciation schedule for the dump truck using the sum of the years method with a recovery period of five years.

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?