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1 answer:
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Answer:
56 hours 25 minutes
Step-by-step explanation:
Given:
Suppose it takes 45 hours for robot A to construct a new robot
It takes 25 hours for both robots to construct a new robot.
Question asked:
How long would it take robot B to construct a new robot, working alone ?
Solution:
Let the time taken by robot B to construct new robot =
<u>By robot A</u>
It takes 45 hours to construct = 1 new robot
It takes 1 hour to construct =
<u>By robot B</u>
It takes hours to construct = 1 new robot
It takes 1 hour to construct = new robot
<u>By working together</u>
It takes 25 hours to construct = 1 new robot
It takes 1 hour to construct =
new robot is constructed in = 1 hour
<u><em>New robot is constructed by both working together in 1 hour = New robot is constructed by robot A in 1 hour + New robot is constructed by robot B in 1 hour </em></u>
Subtracting both sides by
Thus, robot B would take 56 hours 25 minutes to construct a new robot, working alone.
Answer:
Takeru bought 72 eggs and baked 18 soufflés .
Step-by-step explanation:
Let
e = number of eggs Takeru bought.
s = number of soufflés Takeru bought.
Then we know that Takeru bought 4 times as many eggs as he baked soufflés, therefore:
And since for every soufflés Takeru bakes he uses 3 eggs, and after backing he has 18 eggs left, we have:
<em>This says that from
eggs there are 18 eggs left after Tkeru used three eggs for each soufflé.</em>
Now we have two equations:
We put the value of e from equation (1) into equation (2) and solve for s and get:
Thus
Number of eggs Takeru bought = 72.
Number of soufflés Takeru bought = 18.