![kelseybell5360](/avatars/15024.jpg)
kelseybell5360
02.03.2020 •
Mathematics
A train travels 200 km in the same time that a plane covers 900 km. If the speed of the plane is 20 km per hr less than 5 times the speed of the train, find both speeds. r t d Train x 200 Plane y 900
Solved
Show answers
More tips
- S Style and Beauty How to Properly Tie a Tie: 5 Simple Steps...
- L Leisure and Entertainment How to Make a Crab Trap in Just a Few Minutes...
- H Health and Medicine How Much Does Abortion Cost? Expert Answers and Insights...
- S Sport How to Build Arm Muscles? Effective Exercises and Tips...
- H Health and Medicine When can it be said that a person has a normal pulse?...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
Answers on questions: Mathematics
- M Mathematics Please help me with this it’s confusing me...
- M Mathematics Please simplify 3➗5➗3➗7...
- M Mathematics PLS HELP I WILL GIVE BRAINLIEST JUST PLS ANSWER CORRECTLY PLS...
- M Mathematics Find the value of the variable in each triangle, Round all anges to the nearest degree and all side lengths to the nearest tenth 409 500...
- M Mathematics Which of these inequalities us graphed below?...
- M Mathematics HALP. I SHALL GIVE BRAINLIEST. Idk...
- M Mathematics Pizza Hut charges $12 for each pizza plus a three delivery fee which equation best represents the relationship why is the total cost and eggs is the number of pizza order...
- M Mathematics Which answer choice best represents a degree n polynomial whose zeros include: - 4 (with multiplicity 2), 20, i, and - 3+i along with any other complex zeros? A. Degree:...
- M Mathematics Complete the square for this equation that has coefficients of its terms as variables: ax2 + bx + c = 0. What is the final line of the calculation? What is the significance...
- M Mathematics PLEase help I really need this...
Ответ:
the speed of the train is 40 km/h
the speed of the plane is 180 km/h
Step-by-step explanation:
Let x represent the speed of the train.
If the speed of the plane is 20 km per hr less than 5 times the speed of the train, it means that the speed of the plane would be (5x - 20) km/h
Time = distance/speed
The train travels 200 km. This means that the time taken to travel 200 km is
200/x
in the same time that a plane covers 900 km. This means that the time taken to travel 900 km is
900/(5x - 20)
Since the time is the same, then
200/x = 900/(5x - 20)
Cross multiplying, it becomes
200(5x - 20) = 900x
1000x - 4000 = 900x
1000x - 900x = 4000
100x = 4000
x = 4000/100
x = 40
The speed of the plane would be
5 × 40 - 20
= 180
Ответ:
THE ANSWER IS THE BEST ANSWERS IS ₱16283