Explanation

Pages read per day = 5 days/100 pages

​=20 pages per day

Explanation

To calculate the total number of people:

$$text{Total number of people} = (text{Your position from the start}) + (text{Your position from the end}) - 1$$

Substitute the values:

$$6+6-1=11$$

Explanation

1 dozen eggs = 12 eggs, costing Rs. 250.

Cost per egg =  250/12 Rs.

For 30 eggs, the cost =  30 × 250/12 = 250

​Let's calculate it:

Cost for 30 eggs = 30 × 250/ 12 = 30 × 20.83 = 625

Cost for 30 eggs =30×20.83=625

So, the cost price of 30 eggs is Rs. 625.

Explanation

To find the distance between the centres of two externally touching circles, we can use the fact that the distance between the centres is equal to the sum of the radii of the two circles.

Let's denote the radius of circle A as rA (which is 2 cm) and the radius of circle B as rB (which is 3 cm).

The distance between the centres of the two circles, d, can be calculated as:

d = rA + rB

Plugging in the values:

d = 2 cm + 3 cm

d = 5 cm

Therefore, the distance between the centres of Circle A and Circle B is 5 cm.

Explanation

A cake is divided into 2 equal pieces

then half of one part of the cake is twice the other half = 4 

2 + 4 = 6 

so cake is divided into 6 parts 

Explanation

The length of cloth painted by one man in one day = 48 / 4 x 2 = 6 m 

No. of days required to paint 36 m cloth by 6 men = 36 / 6 x 6 = 1 day

Explanation

Explanation

To find the average cost per book when 4 books were bought for a total of 320, follow these steps:

Total cost of the books: 320

Number of books: 4

Calculate the average cost per book:

Average cost per book = Total cost/ Number of books 

= 320/ 4

= 80

Explanation

Let the amount lent at 7% be Rs. x

Amount lent at 10% is Rs. (6000 – x)

Total interest for one year on the two sums lent

= 7/100 x + 10/100 (6000 – x) = 600 – 3x/100

=> 600 – 3/100 x = 450 => x = 5000

Amount lent at 10% = 1000

Required ratio = 5000 : 1000 = 5 : 1

Explanation

Numbers that are multiples of 2 are even numbers.

The sum of even numbers 1 to 100 is 2550.

The average or mean of all even numbers 1 to 100 is 51.