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44% of cash is increased
Step-by-step explanation:
If the number of rooms is r, and cost of a room is c,
New number of rooms = 120% of r
As the cost varies on the number of rooms, the new cost is 120 % of c.
New cost = 120% of (120% of c) = (120/100 * 120/100) * c = 144/100 * c
= 144 % of c = 44% increase in c
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