Explanation

• The ear canal (external auditory canal) transmits sound waves from the outer ear to the eardrum in the middle ear.
• It acts as a conduit, amplifying sound slightly and protecting the inner structures.
• Ear Canal length: ~2.5 cm in adults

Last verified on 19-03-2026

Explanation

• The iris is the colored part of the eye (blue, brown, green, etc.).
• It controls the size of the pupil, regulating how much light enters the eye.

Additional information:

• Pupil – black opening for light
• Cornea – transparent front layer
• Lens – focuses light
• Retina – receives image

Last verified on 19-03-2026

Explanation

Sum of 5 numbers = 5 × 13 = 65

Sum of 4 numbers = 4 × 10 = 40

Fifth number = 65 - 40

= 25

Last verified on 19-03-2026

Explanation

Let youngest child's age = x

Other ages = x+5, x+10

Sum of ages = x + (x+5) + (x+10) = 36

3x + 15 = 36

3x = 21

x = 7

Last verified on 19-03-2026

Explanation

Time spent washing 3 cars = 3x

Time spent putting away = 10 minutes

Total time = 85 minutes

Equation: 3x + 10 = 85

Last verified on 19-03-2026

Explanation

Length = 12 m

Width = 7 m

Perimeter = 2(L + W)

= 2(12 + 7)

= 2 × 19

= 38 meters

Last verified on 19-03-2026

Explanation

Let numbers be 5x and 4x.

5x - 4x = 10

x = 10

Largest number = 5x

= 5 × 10

= 50

Last verified on 19-03-2026

Explanation

Mean proportion between 5 and 45 is √5×45

= √225

= 15

Last verified on 19-03-2026

Explanation

Faheem : Imran : Naveed

= 80,000 : 70,000 : 50,000

= 8 : 7 : 5

Last verified on 19-03-2026

Explanation

Men : Women = 4 : 5

Total parts = 4 + 5 = 9

Women = (5/9) × 45

= 25

Last verified on 19-03-2026