If 40 metres of a cloth costs Rs 1940, how many metres can be brought for Rs 727.5?

Explanation

Let `x` number of metres of cloth can be bought in Rs.`727.5`
Then, cost of `1` metre `=727.5/x` .......(i)
And cost of `40` metres of cloth is Rs`1940`
Then, cost `1` m cloth `=1940/40`......(ii)
So, from (i) and (ii) we get,
`727.5/x = 1940/40`
`=>727.5 xx 40 = 1940 xx x`
`=>727.5 xx 40/1940 `
`=>x=15`
Hence,`15` number of metres of cloth can be bought in Rs.`727.5`.