Question

15 chair and 2 table cost rupees 400 find the cost of 12 and 3 table the cost of 10 chair being equal to that of 4 table

Answer 1

LetthecostofachairandthatoftablebeRs.xandRs.yrespectively.Then,10x=4yory=52x∴15x+2y=4000⇒15x+2×52x=4000⇒20x=4000∴x=200So,y=52×200=500Hence,thecostof12chairsand3tables=12x+3y=Rs.(2400+1500)=Rs.3900