Question

online hay koi to Class 7th mathematics ka question 2 ​

Answer 1

→Here are few questions with solutions:

↔ Find the range of heights of any ten students of your class.

↔Solution:

Let us assume heights (in cm) of 10 students of our class.

= 130, 132, 135, 137, 139, 140, 142, 143, 145, 148

By observing the above mentioned values, the highest value is = 148 cm

By observing the above mentioned values, the lowest value is = 130 cm

Then,

Range of Heights = Highest value – Lowest value

= 148 – 130

= 18 cm

⇔ Find the mean of the first five whole numbers.

↔Solution:

The first five Whole numbers are 0, 1, 2, 3, and 4.

Mean = (Sum of first five whole numbers)/ (Total number of whole numbers)

Then,

Sum of five whole numbers = 0 + 1 + 2 + 3 +4

= 10

Total Number of whole numbers = 5

Mean = (10/5)

= 2

∴Mean of first five whole numbers is 2.

⇔7n + 5 = 19 (n = 2)

↔Solution:

LHS = 7n + 5

= (7 × (2)) + 5

= 14 + 5

= 19

By comparing LHS and RHS

19 = 19

LHS = RHS

Hence, the value of n = 2 is a solution to the given equation 7n + 5 = 19.

→Find the area of a square park whose perimeter is 320m.

⇔Solution:

Perimeter of the square park = 320 m

4 × Length of the side of park = 320 m

Then,

Length of the side of park = 320/4

= 80 m

So, Area of the square park = (length of the side of park)2

= 80²

= 6400 m²

Answer 2

here is your question , it is the question of class 7