Question

Which of the following is incorrect?

• A. 1 mean solar day = 24 hours
• B. 10 years = 10 decade
• C. 1 hour = 60 minutes
• D. 1 minute = 100 seconds

Answer 1

Answer: (B), (D)

1 minute = 100 seconds

(i) A minute consists of 60 seconds and not 100 seconds.

(ii) A decade represents 10 years.
$\therefore$ 1 decade = 10 years.

Hence,

1 mean solar day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds
10 years = 1 decade