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pearlielb
05.07.2021 •
Mathematics
If Joanne can paint a room in 3 hours and her sister Angela can paint the same room in 4 hours, how long (in h) would it take Joanne and Angela to paint the room working together? Round to the nearest tenth.
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Ответ:
Step-by-step explanation:
If J can paint a room in 3 hours, in 1 hour she gets
of the job done.
If A can paint a room in 4 hours, in 1 hour she gets
of the job done. We need to find out how long it takes them if they paint together. The equation for this is:
4x + 3x = 12 so
7x = 12 and
x = 1.7 hours to get the room painted together.
Ответ:
explanation