https://foxoyo.com/mcq/81075/the-price-of-commodity-p-increases-by-40-paise-every-year-while-the-price-of-commodity-q-increases-by-15-paise-every-year-if-in-2001-the-price-of-commodity-p-was-rs-420-and-that-of-q-was-rs-630-in-which-year-commodity-p-will-cost-40-paise-more-than-the-commodity-q