Explanation

a - b = 3

a2 + b2 = 2

the formula used: (a-b)2 = a2 +b2 -2ab

Calculation:

a - b = 3

squaring both sides 

a2 + b2 - 2ab = 9 

2 - 2ab = 9

2 - 9 - 2ab = 0 

-7/2 = ab

Explanation

= (1+.1+.01+.001)

=1.111

Explanation

Explanation

Explanation

To solve this problem, let's assign values to the given symbols and evaluate the expression step-by-step:

- P donates "-" (subtraction)

- Q donates "+"

- R donates "x" (multiplication)

- W donates "+"

Now, let's substitute the symbols with their corresponding operations in the expression:

48 Q 12 R 10 P 8 W 4

= 48 + 12 x 10 - 2 + 8 + 4

Using the order of operations (PEMDAS/BODMAS), we perform the multiplication first:

= 48 + 12 x 10 - 2 + 8 + 4

= 48 + 120 - 2 + 8 + 4

Then, we perform the addition and subtraction from left to right:

= 48 + 120 - 2 + 8 + 4

= 168 - 2 + 8 + 4

= 166 + 8 + 4

= 174 + 4

= 178

Therefore, 48 Q 12 R 10 P 8 W 4 equals 178.

Explanation

 Waqas is taller than Rabail, but shorter than Javed.

- Shahid is the shortest.

- Dawood is taller than Shahid, but shorter than Rohil.

From the given information, we can deduce the following height order:

Shahid < Dawood < Rohil

Now, let's combine this with the information about Waqas, Rabail, and Javed:

Waqas > Rabail > Javed

Combining both sets of information, we can determine the overall height order:

Shahid < Dawood < Rohil < Waqas < Rabail < Javed

Therefore, Javed is the tallest among all the mentioned individuals.

Explanation

Let's assume the age of the youngest child is x. The ages of the other children can be represented as follows:

Second child: x + 2

Third child: x + 4

Fourth child: x + 6

Fifth child: x + 8

Sixth child: x + 10

To find the sum of their ages, we add up these values:

x + (x + 2) + (x + 4) + (x + 6) + (x + 8) + (x + 10)

Simplifying the expression:

6x + 30 = 60

Now, we can solve for x:

6x = 30

Dividing both sides of the equation by 6:

x = 5

Therefore, the age of the youngest child is 5 years old.

Explanation

subtract 4 from both sides:

a/2 + 4 - 4 = 7/2 - 4

a/2 = 7/2 - 8/2

 Simplify the right side of the equation by subtracting the fractions:

a/2 = (7 - 8)/2

a/2 = -1/2

Multiply both sides of the equation by 2 to eliminate the fraction:

2 * (a/2) = 2 * (-1/2)

a = -1

Explanation

In the given list, "Ton" does not belong to the others.

 inch, feet, and centimeters all are units of length

while, "Ton" is a unit of weight or mass, not length. A ton is a unit of measurement

Explanation

both 3 and 13 reach their destination at the same time after 3 minutes

hence the time taken is 7+10+3=20 minutes.