Rate of work of something is defined as the quantity of work done in the time taken. The the time taken to produced the 3000,000 smartphone by the company is 20 hours. Therefore the option B is the correct option.
Given information-
A large smartphone company produces 15,000 smartphones per hour.
Total number of the smartphone has to produced is 300,000.
What is rate of work?
Rate of work of something is defined as the quantity of work done in the time taken.
Rate of work is inverse of the time taken. The time \(t\) for the rate of work \(r\) can be given as,
\(t=\dfrac{w}{r}\)
Here \(w\) is the total work done.
For the given problem the as the smartphone company produces 15,000 smartphones per hour. Thus the rate of work of the company per hour is,
\(r=15000\)
As total number of the smartphone has to produced is 300,000. The rate of the work of the company is 15000. Thus the time taken to produced the 3000,000 smartphone is,
\(t=\dfrac{300000}{15000}\\t=20\)
Thus the the time taken to produced the 3000,000 smartphone by the company is 20 hours. Therefore the option B is the correct option.
Learn more about the rate of work here;
https://brainly.com/question/169382
