A composite shaft is made of an inner core of steel surrounded by an outer jacket of titanium. The shaft is subject to a tensile force of 42 kN. Both the steel core and the titanium jacket have the same cross sectional area 465 mm² and are fully bonded together so that each takes a certain share of the load. The Young modulus of the inner steel core is 200,000 N/mm2 and that of the titanium is 100,000 N/mm². Determine the stress in the steel core in N/mm². Round off your answer to two decimal places.
