The cost of 97 metre of cloth is Rs 242.50. What length of this can be purchased for Rs 302.50?

Explanation

Let `x` meter be the length of the cloth that can be purchased for Rs. `302.50`
Since the length of the cloth and its cost are in direct variation, we have :
`⇒97/x=242.50/302.50`
`⇒97×302.50=x×242.50`
`⇒ x=121`
∴ The required length will be `121` meter.