1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Brums [2.3K]
3 years ago
11

How tall would the lighthouse be?...

Mathematics
1 answer:
UkoKoshka [18]3 years ago
8 0

Answer:

122.6 m

Step-by-step explanation:

Shadow cast by the man = 3.1 m

Height of the man = 1.9 m

Shadow cast by the lighthouse = 200 m

Height of the lighthouse = x

If two shapes are similar, the ratio of their corresponding sides would be equal.

Therefore,

x/1.9 = 200/3.1

Multiply both sides by 1.9

x = (200*1.9)/3.1

x = 122.6 m (nearest tenth)

The lighthouse is 122.6 m tall

You might be interested in
When a watch is sold at ksh 126 aloss of x percent is made . If the same ksh 126, a loss of x percent is made . If the same watc
Nitella [24]

Answer:

ksh 140

Step-by-step explanation:

When a watch is sold for ksh 126 a loss of x% is made, that is( 100 - x)%

Hence, the loss amount = (126 X 100)/(100 - x)

When the same watch is sold for ksh 154 a profit of x% is made, that is (100 + x)%

Hence, the profit amout = (154 X 100)/(100 + x)

Therefore, (126 X 100)/(100 - x) = (154 X 100)/(100 + x)

12600(100 + x) = 15400(100 - x)

1260000 + 12600x = 1540000 - 15400x

28000x = 280000

x = 10%

In that case for a watch sold for ksh 126 a loss 10% is made, that is( 100 - 10)%

Hence, loss amount = (126 X 100)/90 = ksh 140

∴ the buying price is ksh 140

7 0
3 years ago
A steamer going downstream traveled the distance between two ports in 3 hours. The return trip took 3 hours 40 minutes. Find the
lapo4ka [179]

Answer:

1.8 mph

Step-by-step explanation:

Speed of the steamer in still water is 18 mph.

Speed of the current = x mph.

1. The steamer going downstream traveled the distance between two ports in 3 hours. Traveling downstream the current "helps" the steamer, then the speed is 18 + x mph.

The distance traveled downstream = 3(18 + x) miles.

2. The steamer going upstream traveled the distance between two ports in 3 hours 40 minutes that is 3\frac{2}{3} hours. Traveling upstream the current "interferes" the steamer, then the speed is 18 - x mph.

The distance traveled upstream 3\dfrac{2}{3}(18-x) miles.

3. The distances are the same, so

3(18+x)=3\dfrac{2}{3}(18-x)

Solve this equation:

3(18+x)=\dfrac{11}{3}(18-x)\\ \\9(18+x)=11(18-x)\\ \\162+9x=198-11x\\ \\9x+11x=198-162\\ \\20x=36\\ \\x=1.8\ mph

6 0
3 years ago
Explain how you would find the sum of 46+7
tankabanditka [31]
You add the numbers up so 53
8 0
3 years ago
Read 2 more answers
HELP ME <br> What is the expression in simplest form? 21 - 6n + 2(2n - 5 ) - 3n
goblinko [34]

21-6n+2(2n-5)-3n

First, multiply 2x2n and 2x-5

21-6n+4n-10-3n

Then rearrange the terms

4n-6n-3n+21-10

Then combine like terms

-5n+11

hope it helps!

5 0
4 years ago
There are 6 minutes of commercials for every 24 minutes of television.How many minutes of commercials are there in 1hour and 36
LUCKY_DIMON [66]

commercial time 6mins per 24 mins

in 1h 36 m (=96mins) there are 4 - 24 minute periods. Therefore there are 4 x6mins of commercial time = 24mins

7 0
3 years ago
Other questions:
  • The number of people attending the first basketball game of the season was 840. The number of people attending the last game of
    15·1 answer
  • Becky made 2 video tapes while a giant hummingbird fed 4 times and a ruby throated hummingbird fed 8 times from her new feeder.
    15·2 answers
  • What is 22 times 2 do it quickly
    12·2 answers
  • Idk how to do this can you help me
    13·1 answer
  • G = -7 and h = 3 What is the answer for gh
    8·2 answers
  • Need help :///////:::::/:/:/:/:::/://:::///:://:;://::::
    9·1 answer
  • 1/2 =2x-1/3<br><br> HELP PLZZZZZZZZ
    14·2 answers
  • Need help with number 43 and 45 and need to show the work
    6·1 answer
  • Answer the problem in the picture please
    10·1 answer
  • Pls help. Will give brainliest.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!