Question

If the cost of 3 pens and 5 pencils is Rs 14, then what is the cost of 10 pens and 12 pencils?

Answer 1

cost of one pencil =14/5=2.8
cost of one pen=14/3=4.6
cost of 10 pens=10×4.6=46
cost of 12 pencils=12×2.8=33.6