From 7 : 00 AM to 11:00 AM it rained 2.25 inches. At 11:00 AM the rain increased ti fall at a rate of 1.25 inches 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. At 11:00 AM the rain increased ti fall at a rate of 1.25 inches every two hours. How many inches of rain landed on the ground by 5:00 PM? Correct Answer 6 inches

  Given, From 7:00 AM to 11:00 AM it rained 2.25 inches here, 11AM - 5PM = 6 hrs rainfall increased 1.25 every 2 hrs so,rainfall increased 6/2 = 3 times  rainfall from 11am - 5pm = 3*1.25 = 3.75 inches total rain = 2.25 + 3.75 = 6 inches (ans)  
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