A metal rod of density 7000 kgm-3 and cross-sectional area of 0.001257m2 has a mass of 1.76kg. Calculate its length.
-
A.
0.20m -
B.
0.25m -
C.
0.40m -
D.
0.50m
Correct Answer: Option A
Explanation
P = (frac{M}{AL})
L = (frac{M}{CA})
= (frac{1.76}{7000 times 0.001257})
= 0.2m