Question

If 5 pens cost ₹ 10 and 2 pencils cost ₹ 4. What is the cost of 2 pens and 5 pencils?

Answer 1

Cost of 5 pens = ₹10
$\Rightarrow$ Cost of 1 pen = $\frac{10}{5}=₹2$
Also, Cost of 2 pencils = ₹4
$\Rightarrow$ Cost of 1 pencil = $\frac{4}{2}=₹2$
$\therefore$
2 pens and 5 pencils cost : $(2\times 2)$ + $(5\times 2)$ = 4 + 10 = ₹14

Thus, the total cost of 2 pens and 5 pencils is ₹14.