- A tank is being filled at the rate of four cubic feet per second, and drained at the rate of two cubic feet per second. After two minutes, there are three hundred cubic feet of water in the tank. How much water was in the tank at the beginning of the two minutes?
Ans.cubic feet - A submarine can go ten miles an hour under water, and twenty miles an hour above water. How long will it take it to go 100 miles, if it has to go three-fifths of the way under water?
Ans.hours - If the formula for converting Daylight Saving Time (D) into Standard Time (S) is S + 1 = D, and for converting Eastern Time (E) into Central Time (C) is E - 1 = C, then what time is it by Central Standard Time when it is six a.m. by Eastern Daylight Saving Time?
Ans.M. - A watch was set right at noon on Thursday. At 6 p.m. on the next day, it was thirty minutes fast. At that rate, how much will it gain in half an hour?
Ans.sec. - How many times must 1
+3⁄4 be added to 4+1⁄4 to get 16+1⁄2?
Ans.times - A bucket two feet in diameter and three feet high is used to hoist out the earth in digging a well ten feet in diameter and thirty feet deep. How many bucketfuls must be hoisted out? (The area of a circle is 3.1416 times the radius squared.)
Ans. - A dealer bought a lot of three horses and some mules for $600, and sold the lot for $820. If he gained forty dollars on each horse, and fifty dollars on each mule, how many mules were there?
Ans.$mules - A certain division contains 3000 artillery, 15,000 infantry, and 1000 cavalry. If each branch is expanded proportionately until there are in all 20,000 men, how many will be added to the artillery?
Ans.men - If it takes five men four days to dig a hundred foot drain, how many men are needed to dig a two hundred foot drain in half a day?
Ans.$men - A regiment marched 103 miles in four days. The first day, they marched eight hours at a rate of three miles an hour; the next day, nine hours at the same rate; the third day six hours at four miles an hour. If they marched at four miles an hour on the fourth day, how many hours did they march on that day?
Ans.hours
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