he minimum compressive strength of first class brick should be
a) 75 kg per centimeter square
b) 90 kg per centimeter square
c) 100 kg per centimeter square*
d) 120 kg per centimeter square
a) 75 kg per centimeter square
b) 90 kg per centimeter square
c) 100 kg per centimeter square*
d) 120 kg per centimeter square