A horizontal safely supports a load P that varies jointly as the product of the width W of the beam and the square of the depth D and inversely as the length L. A beam that has a width of 5 in, depth of 12 in, and length of 3 in can safely support 3,120 lb. Determine the safe load in pounds of a beam made from the same material if the beam is 15 in long.
The safe load is?

Question

A horizontal safely supports a load P that varies jointly as the product of the width W of the beam and the square of the depth D and inversely as the length L. A beam that has a width of 5 in, depth of 12 in, and length of 3 in can safely support 3,120 lb. Determine the safe load in pounds of a beam made from the same material if the beam is 15 in long.
The safe load is?

ribhu · Answer

@ChloeSmith09 i have solved it earlier for u

ribhu · Answer

3120= k.5.12.12/3
P=k.5.12.12/15

ribhu · Answer

P=3120/5