Explanation

4 workers take 9 hours

=> Total work = 4 × 9 = 36 worker-hours

6 workers => time = Total work / workers

= 36 / 6

= 6 hours

Last verified on 10-02-2026

Explanation

A(3, 10) B(3, 2)

Distance = √[(x2-x1)² + (y2-y1)²]

= √[(3-3)² + (2-10)²]

= √[0 + (-8)²]

= √64

= 8

Last verified on 10-02-2026

Explanation

Area = x³ - 7x² + kx - 8

Length = x - 2

Width = Area / Length

(x-2) is a factor, so remainder = 0 when x = 2

=> 2³ - 7(2)² + k(2) - 8 = 0

=> 8 - 28 + 2k - 8 = 0

=> 2k = 28

=> k = 14

Last verified on 10-02-2026

Explanation

156 Yen = 1 USD

23,400 Yen = 23,400 / 156 USD

= 150 USD

Last verified on 10-02-2026

Explanation

14m² → 35 minutes

26m² → x minutes

x = (26 × 35) / 14

x = 65 minutes

Last verified on 10-02-2026

Explanation

Original price = 4000

Discounted price = 2800

Discount = 4000 - 2800 = 1200

Discount percentage = (Discount/Original price) × 100

= (1200/4000) × 100

= 30%

Last verified on 10-02-2026

Explanation

Ali ate 1 2/5 = 7/5 pizzas. Hamna ate same quantity of burgers. 

Assuming size difference isn't given, Hamna ate same numerical quantity.

Last verified on 10-02-2026

Explanation

De Morgan's first law states that the complement of the union of two sets A and B is equal to the intersection of their complements.

The correct representation is:

(AUB)' = A' ∩ B'

Last verified on 10-02-2026

Explanation

Arithmetic Progression (AP): A sequence where each term differs from the previous term by a constant (d).

If d = 0, every term is the same → sequence is constant.

Example: 5, 5, 5, 5, 5 → common difference = 0

Last verified on 10-02-2026

Explanation

nC6 = nC12 => n = 6 + 12 = 18 (since nCr = nCs => n = r + s)

Last verified on 10-02-2026