Voltage = 220 v Current = 4 amps Resistance = 18 55 224 880
2 answers:
Answer: The correct answer is 55 ohm.
Step-by-step explanation:
The mathematical expression fro ohm's law is as follows;
V=IR
Here, V is the voltage, I is the current and R is the resistance.
It is given in the problem that Voltage = 220 v Current = 4 amps.
Calculate the resistance by rearranging the expression.
Put V = 220 V and I= 4 A.
R= 55 ohms
Therefore, the value of resistance is 55 ohms.
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The apprentice needs 6.25 hours to complete the job using the brush
<h3><u>Solution:</u></h3>Given, A master painter can paint 110 square yards of surface area with a roller in 1 hour
We know that 1 yard = 3 feet
While his apprentice can paint 85 square feet of surface area per hour with a brush
Together they are painting a building with a surface area of 5100 square feet.
After painting for hours , the master painter lets the apprentice Finish the job.
Now, they worked for hours
Then, area painted = area painted by master + area painted by apprentice
Now, the remaining area to be painted = total area – painted area
Area to be painted = 5100 – 4568.75 = 531.25
So, apprentice has to paint 531.25 square feet alone.
Hence, the apprentice needs 6.25 hours to complete the job