Explanation

Let's call the marked price "x".

Since Saba got a 30% discount, she paid 70% of the marked price (100% - 30% = 70%).

The amount she paid is Rs. 6300, so:

70% of x = 6300

0.7x = 6300

x = 6300 / 0.7

x = 9000

Explanation

The decimal equivalent of 1/2 is 0.5.

Explanation

A sector is a region of a circle enclosed by two radii and the arc between them.

Example: A pizza slice is a sector.

Explanation

The difference between +16 and +28 is:

+16 - (+28) = +16 - 28 = -12

Explanation

a² - b² = (a - b)(a + b)

a⁴ - b⁴ = (a² - b²)(a² + b²)

= (a - b)(a + b)(a² + b²)

The LCM is (a - b)(a + b)(a² + b²) = (a² - b²)(a² + b²)

= a⁴ - b⁴

Explanation

Set A is a subset of B because all elements of A are present in B.

Symbol ⊂ means "is a subset of".

Explanation

Area of a circle = πr².

If radius is doubled (2r), new area = π(2r)² = 4πr² → 4 times the original area.

Explanation

Step 1: Calculate the total work hours for four workers

Total work hours = 4 workers × 8 hours = 32 worker-hours

Step 2: Calculate the time required for six workers

Time = Total work hours / Number of workers

= 32 worker-hours / 6 workers

= 5.33 hours

= 5 hours 20 minutes

Explanation

Let's find the expense per guest:

Expense for 35 guests = 52,500

Expense per guest = 52,500 / 35

= 1,500

Expense for 85 guests:

= 85 × 1,500

= 127,500

Explanation

On the number line, Point X is clearly positioned at -4, which is four units left of 0.