Question

A reduction of 20% in the price of wheat enables a person to buy3.5kg more wheat for rs 770. the orginal price of rice is ​

Answer 1

let initial price, ip = p

then final price, fp = p×(1-20%) = 0.8p

ip:fp = 1:.8 = 5:4

so quantity ratio of initial quantity iq and final quantity pq

iq:fq = 4:5

1part = 3.5kg

iq = 4 parts = 14kgs

ip*iq = 770

ip = 770/14 = 55

original price = 55/-