The sum of two numbers is −21. One number is 55 less than the other. Find the numbers.
1 answer:
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Answer : 4.5 × 10⁴ square inches can be washed per hour.
Step-by-step explanation :
As we are given that an area can be washed at a rate of 4,900 cm²/min. Now we have to determine the square inches can be washed per hour.
Given conversions are:
1 cm = 0.39 in and 1 hr = 60 min
As, 1 cm² = (0.39)² in² and 1 min = 1/60 hr
So,
Now we have to determine the square inches can be washed per hour.
As,
So,
Therefore, 4.5 × 10⁴ square inches can be washed per hour.