Question

if price of 2 chair = price of 5 table,
price of 10 chair + price of 10 table = rs. 7000,
so what is the cost of 4chair+6table

Answer 1

let chair x and table y. then 2x=5y. y=2x/5. 10x+10y=7000. 10x+10×2x/5=7000. 10x+4x=7000. x=7000÷14=500. x=500. so y=2×500÷5=200. y=200. then 4 chair+6table=(4×500)+(6×200)=2000+1200=3200 ans