Can you solve this ? - Creative Thinkers Only !!!!!!!

[Good Heart]

Q1. In miles per hour, what is the average rate of a car going 20 mph and traveling back the same distance at 60 mph?

30mph

 

[MihiCherub]

30mph

 

[bid87]

Answer ...

Q1. In miles per hour, what is the average rate of a car going 20 mph and traveling back the same distance at 60 mph?

if we consider the car is driven for 1 hour.

Original direction - 20 miles (time taken 1 hour)
Coming back - 20 miles (time taken 20 minutes - 60*20/60)

Total distance = 40 miles
Total time taken = 80 minutes or 1.33 hours

Average rate = 40/1.33 = 30.08 miles per hour

 

[December]

addition of 1/2, 1/3 & 1/9 gives 17/18. So it explains everything I guess..

 

[bid87]

Explains what exactly ??

addition of 1/2, 1/3 & 1/9 gives 17/18. So it explains everything I guess..

 

[MihiCherub]

if we consider the car is driven for 1 hour.

Original direction - 20 miles (time taken 1 hour)
Coming back - 20 miles (time taken 20 minutes - 60*20/60)

Total distance = 40 miles
Total time taken = 80 minutes or 1.33 hours

Average rate = 40/1.33 = 30.08 miles per hour

correct...

Average rate is not the average of the rates, the distance does not need to be known. Where a and b are the two rates, the average rate can be shown to be
2ab/(a + b), so 2(20)(60)/(20 + 60) = 30.

Average rate = Total distance/Total time.
Let’s say the distance is D one way. Then the total distance is 2D.
Let’s say the time the car travels 20 mph is t and the time the car travels 60 mph is T.
Then from the formula Rate × Time = Distance, 20 × t = D and 60 × T = D.
This gives you t = D/20 and T = D/60.

So the total time is,
t + T = D/20 + D/60. This is equal to t + T = 80D/1,200 = D/15.

So the average rate = 2D/(t + T) = 2D/(D/15) = 30.

 

[MihiCherub]

Q2. A doctor’s son’s father was not a doctor. How is this possible?

 

[hancok]

40 n 60

avarage velosity 2 nam 0 i

 

[epw]

Q2. A doctor’s son’s father was not a doctor. How is this possible?

Mother was the Doctor.

 

[ewmdyn]

Using the letters "A,A,E,E,I,I,M,M,P,P,T,T" complete this grid with valid words. The grid reads the same across as down.

 

[ewmdyn]

If you are in a dark room with a candle, a wood stove and a gas lamp.


You only have one match, so what do you light first?



plz don't say that you will gonna light a siga

 

[ewmdyn]

Teanchi and Beanchi are a married couple (dont ask me who he is and who she is)!
They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.

What is the probability that the other kid is also a girl?


Hint: It is not 1/2 as you would first think.

 

[ewmdyn]

Q2. A doctor’s son’s father was not a doctor. How is this possible?

In another way, son's mum is a doctor, so father can be anyone

 

[SaNDun]

Using the letters "A,A,E,E,I,I,M,M,P,P,T,T" complete this grid with valid words. The grid reads the same across as down.

The words are limp, idea, meat, pate.

 

[ewmdyn]

The words are limp, idea, meat, pate.

you are right

 

[MihiCherub]

If you are in a dark room with a candle, a wood stove and a gas lamp.

 You only have one match, so what do you light first?

I'd light the match first so I can light the candle, then use the candle to light everything else, If needed.

Ask questions which cannot be googled.

 

[hancok]

Teanchi and Beanchi are a married couple (dont ask me who he is and who she is)!
They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.

What is the probability that the other kid is also a girl?


Hint: It is not 1/2 as you would first think.

0 or 1

 

[epw]

If you are in a dark room with a candle, a wood stove and a gas lamp.


You only have one match, so what do you light first?



plz don't say that you will gonna light a siga

The Match

 

[epw]

Teanchi and Beanchi are a married couple (dont ask me who he is and who she is)!
They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.

What is the probability that the other kid is also a girl?


Hint: It is not 1/2 as you would first think.

1/4

 

[hancok]

1/4

how