Explanation

• The space occupied by a 3-dimensional object is called volume.
• It measures how much space an object contains inside.
• It is a fundamental concept in Geometry.
• It is always measured in cubic units.

Last verified on 14-04-2026

Explanation

• A Geometric Sequence is a sequence where each term is obtained by multiplying the previous term by a constant.
• This constant is called the common ratio (r).
• The value of r ≠ 0.
• Sequence grows or decreases depending on r.

Last verified on 14-04-2026

Explanation

Step 1: Let the numbers be

Three consecutive odd numbers:

$$x-2,x,x+2$$

Step 2: Form an equation

$$(x-2)+x+(x+2)=57$$$$3x = 57$$

Step 3: Solve

$$x=19$$

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Explanation

Let original = x  

x + 20% of x = 540  

1.2x = 540  

x = 540 / 1.2 = 450  

Last verified on 14-04-2026

Explanation

LCM of 16, 24, 30:  

16 = 2⁴  

24 = 2³ × 3  

30 = 2 × 3 × 5  

LCM = 2⁴ × 3 × 5 = 240  

240 is three-digit, so that’s it.  

Last verified on 14-04-2026

Explanation

• A heat engine works between a hot source and a cold sink.
• Efficiency depends on the temperature difference between them.
• Greater the difference, higher the efficiency.
• Maximum efficiency is given by Carnot engine.

Last verified on 14-04-2026

Explanation

• Coulomb's Law was given by Charles-Augustin de Coulomb.
• It explains force between two electric charges.
• Force is directly proportional to charges and inversely proportional to square of distance.
• As distance increases, force decreases rapidly.

Last verified on 14-04-2026

Explanation

• A standing wave is formed by the interference of two waves of equal frequency and amplitude.
• Nodes are fixed points where particles do not move.
• At these points, displacement remains zero at all times.
• Energy transfer at nodes is minimum.

Last verified on 14-04-2026

Explanation

• People is a common noun because it refers to a general group, not a specific name.
• It names persons collectively without identifying any particular individual.

Last verified on 12-04-2026

Explanation

• Past Perfect Continuous = had been + verb(-ing) → had been swimming.
• • It shows an action that continued in the past before another event/time.

Last verified on 14-04-2026