Question

45 packets of water is weighing hundred grams cost 607. 50 what will be the cost of 18 packets of bottle each weighing 500 grams

Answer 1

$cost \: of \: 45 \: packets \ \: each \: weighing \: 100gm \\ = 607.50 \\ cost \: of \: 1 \: pack \: each \: weighing \: 100gm = 607.50 \div 45 = 13.50 \\ cost \: of \: 1 pack \: each \: weighing \: 1gm = 13.50 \div 100 = 0.135 \\ cost \: of \: 1 \: pack \: each \: weighing \: 500gm = 0.135 \times 500 = 67.50 \\ cost \: of \: 18 \: such \: packs = 18 \times 67.50 = 1215$