3 In the apothecary weight system one scruple is 20 grains and three scruples equals one dram Determine the number of grains in 50 drams 4 On a trip of 834 miles an automobile consumed 35 5 gallons of gasoline costing 4 23 per gallon What was the cost of gasoline per mile traveled 5 The following relationships describe an antiquated set of British liquid units Assume all equalities provided are defined 1 hogshead 7 firkin 18 pottle 1 firkin 140 pottle 1 puncheon 504 pottle 1 tun Use dimensional analysis to determine the number of tuns in 144 hogshead