Question

Cost of a toffee and a cake are 15 rupees and 30 rupees respectively. The total cost of 30 toffees and 15 cakes is .

Answer 1

Cost of 1 toffee $=Rs15$
Cost of 30 toffees $=15\times 30=Rs450$
Cost of 1 cake $=Rs30$
Cost of 15 cakes $=30\times 15=Rs450$
Total cost of 30 toffees and 15 cakes $=Rs450+Rs450=Rs900$.