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1. Water has been poured into an empty rectangular tank at the rate of 5 cubic feet per minute for 6 minutes. The length of the tank is 4 feet and the width is one half of the length. How deep is the water in the tank?
- A. 7.5 inches
- B. 7.5 inches
- C. 7.5 inches
- D. 7.5 inches
Answer: Option B
Explanation:
6 minute ধরে 5 cubic feet = 5*6 = 30 cubic feet in tank
length = 4ft, then width = 4/2 = 2ft
therefore, base area = 4*2 = 8 sq ft
base area*depth = 8*depth = 30 cubic ft
depth = 30/8 = 3.75 feet = 3 ft 9 inches
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