Explanation

3 persons can do 3 jobs in 3 days

1/3 of the work will take 1/3 of the time, so

3 people can do 1 job in 1 day

It will take 1 person 3 times as long, so

1 person can do 1 job in 3 days

7 persons can do 7 times the work in the same time, so

7 persons can do 7 jobs in 3 days

Explanation

Car mirrors are fitted on the sides 

enabling the driver to see traffic behind him/her to facilitate safe driving.

Explanation

He has no taste for music.

اسے موسیقی کا کوئی شوق نہیں ہے۔

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In the given sentence, the word 'for' is associated with the nouns 'taste' and 'music' to denote that 'he has no taste for(towards, directed at) music.

Explanation

Explanation

Ozone formula: O3

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

The ozone layer is depleting: Air pollution

ND17-7-2023

Explanation

never کبھی نہیں

always ہمیشہ

Explanation

A railway station is a facility that has railway tracks or lines for trains to carry passengers or goods from one place to another.

Explanation

hot is burn

similarly cold is to freeze

Explanation

Power of a Lens= 1/focal length

Explanation