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From 7:00 AM to 11:00 AM it rained 2.25 inches. At 11:00 AM the rain increased to fall at a rate of 1.25 in. every two hours. How many inches of rain landed on the ground by 5:00 PM?
From 7:00 AM to 11:00 AM it rained 2.25 inches.
A. 7 inches B. 9.75 inches C. 2.35 inches D. 6 inches E. 7.125 inches
At 11:00 AM the rain increased to fall at
a rate of 1.25 in. every two hours.
How many inches of rain landed on the ground by 5:00 PM?
In 4 first hours (from 7:00 AM to 11:00 AM), level of water is 2.25 inches.
From 11:00 AM to 5:00 PM time interval is 6 hours.
From 11:00 AM level of increase of water is 1.25 inches every 2 hours.
2 hours - 1.25 inches
6 hours = (6x1.25)/2 = 3.75 inches
So, total level of water by from 7:00 AM to 5:00 PM is 2.25 + 3.75 = 6 inches. Is that right ?
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