[Anjali]

Let the monthly income of a coolie be ‘x’

Here, coolie deposits Rs 150 per month which is 15% of his monthly income

From the above we can derive that,

x × (15/100) =150

Which implies, x = (150 × 100) / 15

x = 15000/15

x = 1000

∴ Monthly income is Rs 1000

[Anjali]

• The Indus River Valley Civilization, 3300-1300 BCE, also known as the Harappan Civilization, extended from modern-day northeast Afghanistan to Pakistan and northwest India.
• Important innovations of this civilization include standardized weights and measures, seal carving, and metallurgy with copper, bronze, lead, and tin.
• Little is understood about the Indus script, and as a result, little is known about the Indus River Valley Civilization’s institutions and systems of governance.
• The civilization likely ended due to climate change and migration.