Cold crushing strength of ordinary fireclay brick is about 950 kg/cm . On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as __________ kg/cm .

Cold crushing strength of ordinary fireclay brick is about 950 kg/cm .

1.	Cold crushing strength of ordinary fireclay brick is about 950 kg/cm . On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as __________ kg/cm .
A.	450
B.	250
C.	150
D.	65
Answer» E.