Nepal's new prime minister has taken office and "urged calm and co-operation to rebuild" the Himalayan nation after days of violent protests left at least 72 people dead and destroyed government buildings and politicians' homes.

Sushila Karki, the country's first woman prime minister, told top officials gathered at her temporary office each family of slain protesters would receive monetary compensation of one million rupees (about $A17,200) and assured that those injured would be taken care of, state TV reported.

"We all need to get together to rebuild the country," Karki said, pledging to work to get the South Asian nation back on track.

The massive demonstrations - called the protest of Gen Z - began on September 8 over a short-lived social media ban.

Tens of thousands of protesters

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