The ratio of the weight of an object on Earth to an object on Planet X is 2 to 7

Question

The ratio of the weight of an object on Earth to an object on Planet X is 2 to 7. If a person weighs 220 pounds on Earth, find b is weight on Planet X. (Round to the nearest whole number, if necessary.) 3080 pounds 770 pounds 63 pounds 16 pounds Three gift wrappers can wrap a box full of gifts in 20 minutes, 30 minutes, and 90 minutes, respectively, How long win it tale them to wrap the box full of gifts if they work together? (Round to the nearest minute, if necessary.) 14 minutes 47 minutes 140 minutes 11 minutes Solve. In a race, Car A starts 1 mile behind Car B, Car A is travelling at 50 miles per hour, while Car B is traveling at 45 miles per hour. How long will it take for Car A Car B? 9 min 1/5 min 54 min 12 min

Explanation / Answer

12. Wearth / Wx = 2/7 220/Wx = 2/7 Wx = 220 × 2/7 = 770 pounds.

13. If they take 20, 30, 90 minutes respectively then the work done by them in one minutes will be 1/20, 1/30 & 1/90

summation of these gives us the work done by all of them in one minute I.e. (1/20+1/30+1/90) = 17/180 units of work completed in one minute so to complete 1 unit they will take 180/17 minutes I.e. 10 minutes 24.7 seconds

14. distance between cars = 1 miles from starting point

to overtake car a , car b must cover these 1 miles as its velocity is 5 miles per hour more than car a it will take 1/5 hour = 12 minutes

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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