Question

A factory can build 20 cars every hour. If at a certain time a day, they have already built 7 cars, how many cars in total will they have built 3 hours from now?

Answer 1

The factory build total of 67 cars.

Explanation:

Number of cars already built =7

Number of cars built every hour = 20

We need to find the number of cars factory can built in 3 hours.

Now in 1 hour = 20 cars are build

so in 3 hours = number of cars built in 3 hours

By Using Unitary method we get;

Number of cars built in 3 hours =
`20* 3 =60 cars.`

Now we need to find the total car built.

Total car built can be calculated as sum of Number of cars already built and

Number of cars built in 3 hours

Hence we can say that:

Total car built = 7 + 60 = 67

Hence the factory build total of 67 cars.