# Difference between revisions of "TADM2E 1.21"

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1 million seconds = 11.5740741 days | 1 million seconds = 11.5740741 days | ||

+ | |||

+ | ---- | ||

+ | |||

+ | |||

+ | Possible approach: | ||

+ | a) There are 3600s in an hour | ||

+ | b) Eliminating the thousands, we get 1000 / 3.6 | ||

+ | c) 3.6 is about half-way between 3 and 4, thus the result is about | ||

+ | (1000/3 + 1000/4)/2 ≈ (333+250) = 583/2 ≈ 290 | ||

+ | d) About 12 days (240 + 48) | ||

+ | |||

+ | Another approach: | ||

+ | a) There are 3600s in an hour | ||

+ | b) 3600s goes into 10,000s ≈ 3 hours | ||

+ | c) multiply 3 with 100 = 300 hours (since 10,000s is 100 times less than 1,000,000) | ||

+ | d) 24h goes into 30h ≈ 1.2 day | ||

+ | e) multiply 1.2 by 10 = 12 days (since 30h is 10 times less than 300) | ||

+ | |||

+ | [[introduction-TADM2E|Back to ''Introduction ...'']] |

## Latest revision as of 06:12, 26 January 2020

1 million seconds = 277.777778 hours

1 million seconds = 11.5740741 days

Possible approach:

a) There are 3600s in an hour b) Eliminating the thousands, we get 1000 / 3.6 c) 3.6 is about half-way between 3 and 4, thus the result is about (1000/3 + 1000/4)/2 ≈ (333+250) = 583/2 ≈ 290 d) About 12 days (240 + 48)

Another approach:

a) There are 3600s in an hour b) 3600s goes into 10,000s ≈ 3 hours c) multiply 3 with 100 = 300 hours (since 10,000s is 100 times less than 1,000,000) d) 24h goes into 30h ≈ 1.2 day e) multiply 1.2 by 10 = 12 days (since 30h is 10 times less than 300)