1.
कुनै वस्तुको पिण्ड स्थिर हुन्छ तर तौल ठाउँअनुसार फरक हुन्छ ।

The mass of an object is constant but the weight varies from place to place.

this is my explanation :-

just because W = m*g While m is constant, g can smoothly change from place to place ...even though at the same distance from earth centre...at different latitudes tangential speed is different and centripetal acceleration accordingly...not to mention the average density of what it is beneath our feet

Hope this helps