All categories

3 years ago

Q2. Zara travelled in a train moving at an average speed of 120km/h and covered a distance of 40km towards East.

Mathematics

1 answer:

Lunna [17]3 years ago

6 0

Answer:

i. time = distance/speed

= 40/120

= 1/3 hours

ii. distance = speed × time

= 120 × 3

= 360 km

iii. average speed = total distance/ total time

= 250/2.5

= 100 km/h

for the last question, the time is 2.5 hours because 6.00 to 8.30 is 2 hours 30 minutes. so the 30 minutes you must change to hour and plus with 2. thus, u will get 2.5 hours

You might be interested in

What is the result when the number 35 is increased by 20%?<br> Show me your work!

nirvana33 [79]

Answer:

Step-by-step explanation:

first we calculate what is 20% of 35 is then we add it to 35 to find the increased number

35 ÷ 100 = 0.35 this multipled by 20 = 7

35 + 7 = 42

3 0

3 years ago

Write an equation using “” and then solve the equation. The late fee for each day is $2. A patron paid $72 for books that are ov

topjm [15]

Pretty simple equation, where we need to find the number of books. If it is 2$ each day per book
72/9 = 8$ per day is the late fee paid
So if each book is 2$, then we can assume
8/2 = 4 books

So equation is
“# books = (amount paid)/(days * per day payment)”

4 0

2 years ago

What property is this: 3 * 1/3 = 1

Rama09 [41]

Answer:

Inverse property of multiplication

3 0

2 years ago

Please solve this....

ivann1987 [24]

Answer:

the value will be equal to 0

Step-by-step explanation:

see the attached picture for solution --

5 0

3 years ago

The number of surface flaws in plastic panels used in the interior of automobiles has a Poisson distribution with a mean of 0.05

Tresset [83]

Answer:

(a) Probability that there are no surface flaws in an auto's interior is 0.6065 .

(b) If 10 cars are sold to a rental company, what is the probability that none of the 10 cars has any surface flaws is 0.00673 .

Step-by-step explanation:

We are given that the number of surface flaws in plastic panels used in the interior of automobiles has a Poisson distribution with a mean of 0.05 flaws per square foot of plastic panel.

Let X = Distribution of number of surface flaws in plastic panels

So, X ~ Poisson( $\lambda$ )

The mean of Poisson distribution is given by, E(X) = $\lambda$ = 0.05

which means, X ~ Poisson(0.05)

The probability distribution function of a Poisson random variable is:

$P(X=x)=\frac{e^{-\lambda}\lambda^{x}}{x!}; for x=0,1,2,3...$

Now, we know that $\lambda$ for per square foot of plastic panel is 0.05 and we are given that an automobile interior contains 10 square feet of plastic panel.

Therefore, for 10 square foot of plastic panel is = 10 * 0.05 = 0.5

(a) Probability that there are no surface flaws in an auto's interior =P(X=0)

P(X = 0) = $\frac{e^{-0.5}*0.5^{0}}{0!}$ = $e^{-0.5}$ = 0.6065

(b) If 10 cars are sold to a rental company, what is the probability that none of the 10 cars has any surface flaws = $P(X = 0)^{10}$

So, $P(X = 0)^{10}$ = $0.6065^{10}$ = 0.00673

8 0

3 years ago