Suppose tea at 90°C is kept in an open cup and it takes 20 seconds to cool down to 80°C. The time taken for cooling from 80°C to 70°C is

Suppose tea at 90°C is kept in an open cup and it takes 20 seconds to

1.	Suppose tea at 90°C is kept in an open cup and it takes 20 seconds to cool down to 80°C. The time taken for cooling from 80°C to 70°C is
A.	less than 20 seconds
B.	equal to 20 seconds
C.	equal to 10 seconds
D.	more than 20 seconds
Answer» E.