NASA uses a launch clock to measure time before and after lift-off. It takes 2 hours and 15 minutes of preparations on base, 20 minutes to travel to the launch pad, and 40 minutes of pre-launch checks once in the spacecraft. When should the astronauts begin preparation?
Answers
Given : NASA uses a launch clock to measure time before and after lift-off.
It takes 2 hours and 15 minutes of preparations on base,
20 minutes to travel to the launch pad, and 40 minutes of pre-launch checks once in the spacecraft.
To Find " When should the astronauts begin preparation
Solution:
2 hours and 15 minutes of preparations on base
20 minutes to travel to the launch pad
40 minutes of pre-launch checks once in the spacecraft.
astronauts should begin preparation = 2 hours and 15 minutes + 20 minutes + 40 minutes
= 2 hours and 15 minutes + 60 minutes
60 minutes = 1 hr
=> 2 hours and 15 minutes + 1 hr
= 3 hours and 15 minutes
astronauts should begin preparation = 3 hours and 15 minutes
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