1. if x varies directy as y and inversely as z, and x= 10 when y = 5 and z = 3, for what value of z will x = 3 and y = 4?
2. How many men are needed to complete a daily order of 100 cement pots if 8 men can make 40 cement pots per day?
3. The cost of operating an appliance varies jountly as the number of watts drawn, the hours of operation and the cost per per kilowatt-hour. At P8.99 per kilowatt-hour, how much would it cost when a 70-watt dest fan operats for 2 hours?
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