Explanation

To find 3/7 of 14:

(3/7) * 14 = 3 * 2 = 6

Explanation

The head of a chlorophyll molecule contains a porphyrin ring with a central magnesium (Mg) atom.

This ring has four nitrogen atoms that coordinate with the magnesium, forming a stable complex essential for photosynthesis.

Explanation

Steam causes more severe burns than boiling water because it carries latent heat of vaporization.

It releases extra energy when it condenses on the skin.

Explanation

Bold means بہادر

Timid means ڈرپوک

Explanation

Explanation

The micro-teaching system was introduced at Stanford University in 1961.

It was developed as a method for teacher training, allowing educators to practice teaching in a controlled, small-scale environment before applying their skills in larger classrooms.

Explanation

"In" is defined as inside an area, moving from a point outside to a point inside.

"In the light of the lamp" is the correct phrase, meaning she was sewing within the illuminated area created by the lamp.

Explanation

"Rural life" refers to life in the countryside or villages, away from towns and cities.

It typically includes farming, less population density, and natural surroundings.

Explanation

The correct phrase is "by his will", which means according to his desire or choice.

"By" is used to show the agent or means through which something happens — here, his own will.

Explanation

Let's calculate the total work hours:

250 men * 20 days * 5 hours/day = 25,000 man-hours

To finish the work in 10 days working 8 hours a day:

Let x be the number of men required:

x men * 10 days * 8 hours/day = 25,000 man-hours (to complete the same amount of work)

x * 80 = 25,000

x = 25,000 / 80

x = 312.5 (313)