Question

If you make $140 for 21 minutes, what would you make for 18 minutes?

a) $108
b) $120
c) $90
d) $84

Answer 1

By calculating the earnings per minute from the given $140 for 21 minutes, we determine the rate to be $6.67 per minute. Then, by multiplying this rate by 18 minutes, we find out that a worker would make approximately $120 for 18 minutes of work, which aligns with option b).

Step-by-step explanation:

To calculate the respective earnings for 18 minutes based on the given rate of $140 for 21 minutes, we'll first find the earning rate per minute and then apply it to the 18 minutes.

Step 1: Find the earnings per minute.

1. Earnings per minute = $140 / 21 minutes = $6.67 per minute (rounded to 2 decimal places).

Step 2: Calculate earnings for 18 minutes.

1. 18 minutes' earnings = 18 minutes * $6.67 per minute = $120.06 (rounded to 2 decimal places).

So, for 18 minutes of work, you would make approximately $120, which corresponds to option b).