Sound travels fastest through a) space. b) cool air. c) warm air. d) a metal spoon.

I took the test the answer is Metal Spoon because sound always travels fastest through solids!

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

technology is the application of the knowledge gained by science.