Question

$10m$ of cloth cost $₹42,$How many meters can be bought for $₹21?$

Answer 1

Step $1:$ To find how many meters cloth can be bought for $₹21$

It is given that cost of $10m$ of cloth $=$$₹42$

Step $2:$ Now find how many meters cloth can be bought in $₹1$ using unitary method.

In $₹1$ the cloth can be bought $=\frac{10}{42}$ $m$

In $₹21$ the cloth can be bought $=\frac{10}{42}\times 21$

$=\frac{10}{2}$

$=5m$

Hence, in $₹21$ we can bought $5m$ cloth