Explanation

Step 1: Calculate the perimeter of the square ground.

The perimeter of a square is given by P = 4 × side length. Here, the side length is 20 meters.

P = 4 × 20 = 80 meters

Step 2: Calculate the total distance covered in 5 rounds.

Total distance = Number of rounds × Perimeter

Total distance = 5 × 80 = 400 meters

Explanation

A cone has one curved edge, where the circular base meets the curved surface.

It has 1 face (curved) + 1 base and 1 vertex, but only one edge (not straight).

Explanation

Formula: Sum = Average × Number of quantities

Calculation: 215 × 40 = 8600

Explanation

Hardship means مشکلات

Tribulation means مصیبت ۔ تکلیف ۔ آفت

Explanation

Concave mirrors or lenses were used to focus sunlight onto a single point.

This focused sunlight generated high temperatures for cooking or heating.

Explanation

Slope AB = (-2-2)/(5-1) = -4/4 = -1

Slope BC = (2-5)/(1-(-2)) = -3/3 = -1

Since slopes AB and BC are equal (-1), the points A, B, and C are collinear.

Explanation

When comparing two things, we use the comparative form of the adjective, which is "longer" for "long."

"Longest" is the superlative form used when comparing three or more things.

Explanation

Dimitri Mendeleev arranged the elements in order of increasing atomic mass, creating the first widely recognized periodic table.

His arrangement helped predict properties of undiscovered elements and left gaps for them in the table.

Explanation

WAIL means رونا

Cry means رونا

Explanation

Devices like mouse, printer, and network adapters need specific drivers to communicate with the operating system.

Without drivers, the OS can't recognize or control these devices properly.