That’s the answer with steps
Answer:
it descended 31 Feet b b b b b b b b b bb b b b b b b b b b b
3 feet 8 inches converted to inches is 3x12+8=44inches
44inches times 4 pieces is 176 inches.
176 inches converted back to feet and inches is 176/12=14 feet 8 inches so he would need 15 feet of board
276 is the answer because 460 times .6 = 276