1. 5. Two trucks were driven on a 1,680 kilometer (km) trip. The first truck ave

Question

1. 5. Two trucks were driven on a 1,680 kilometer (km) trip. The first truck averaged 14 km per liter of fuel for the trip, and the second averaged 12 km per liter. The second truck used how many more liters of gas than the first? A cargo ship travels at an average speed of 25 kilometers per hour while traveling 500 kilometers from port A to port B. During the return trip along the same route from port B to port A, the cargo ship travels at an average speed of 15 kilometers per hour. What is the approximate difference in the travel times between the two trips? A. 10 B. 20 C. 30 D. 40 E. One cannot tell from the information given A. 12.5 hours B. 13.3 hours C. 26.7 hours D. 33.3 hours E. 53.3 hours 2. 6. A warehouse's rectangular ceiling measures 12 meters by 18 meters, and is covered by acoustic tile squares which are one meter on a side. Each piece of tile weighs a quarter of a kilogram. What will be the total weight of the tile required to cover the ceiling? A book is available at a local store for $20 in the hard cover edition or $10 in paperback. The book can also be obtained from a mail-order service at 30% off list, plus $1 for postage and handling. How much more will it cost to buy the hard cover edition mail order than to buy the paperback edition at the local store? A. 36 kilograms B. 54 kilograms C. 121 kilograms D. 160 kilograms E. 216 kilograms A. $6 B. $10 C. $3 D. $4 E. $5 3. The elevator of a high-rise office building provides access to all floors. If each floor is 5 meters high and the elevator travels at a rate of 7.5 meters per second approximately how long will it take to travel from the first floor to the sixty-eighth floor? 7. In January, the total number of employees at a factoryy was reduced by 8%. In July, the demand for the factory's product increased so the total number of employees was increased by 8%. The total number of employees at the factory in January, before the number of employees was reduced, was 326. What was the total number of employees at the factory after the number of employees was increased in July? A. 2 seconds B. 9 seconds C. 38 seconds D. 45 seconds E. 510 seconds A. 307 employees B. 318 employees C. 324 employees D. 326 employees E. 343 employees

Explanation / Answer

1.

A = Fuel consumed per km = (Total distance travelled)/(Total Fuel consumed) = D/F

Given D = 1680 km

_____________________________________

Now for first truck

A = 14 km/litre

so using above formula

14 = 1680/F

F= 1680/14 = 120 litre ------------------------------1

____________________________

Now for second truck

A = 12 km/litre

so

12 = 1680/F

F= 1680/12 = 140 litre ------------------------------2

From result 1 and result 2 we can say difference in fuel used = 140 -120 = 20 litre. ............. Answer

--------------------------------------------------------------------------------------------------------------------------------------------

2.

Lets first find number of square tiles required to to cover the ceiling , which can be found using the fact that

Area of ceiling = Area of all square tiles

Let there be n tiles So

Area of ceiling = n * Area of one square tile

12 m * 18 m = n * 1*1 .......................( Area of ceiling = length * breadth , Area each f tile = side * side)

so

n = 216

Given weight of each tile = 1/4 kg = 0.25 kg

So weight of 216 tiles = 216 * 0.25 = 54 kg = 54 kilograms _____________Answer

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.