Question

Cost of 25 kg rice and 45 kg wheat is 1095.find cost of 7 kg rice and 15 kg wheat?

Answer 1

let cost of 1 kg rice be 'x' and of 1 kg wheat be 'y' then 25x + 45y = 1095 and we have to calculate the value of 7x + 15y . their are 2 variables so we need atleast 2 equation, so we cannot solve this(need a more information)