Question

the cost of Bananas is increased by Rupees 1 per dozen 1 get 2 dozen less for rupees 840 find the original cost of the one dozen of banana​

Answer 1

Answer:

dude the answer is 420 plz tell

Answer 2

Hope this is helpful to u then mark it as a brainliest answer

Answer =rs 20

Solution Let the cost of 1 dozen bananas is c and can get d dozens of bananas for 840 Rs

hence,

∴cd=840

d=840c

and (c+1)(d−2)=840

(c+1)(840c−2)=840

(c+1)(840−2c)=840

840c+840−2c2−2c=840c

c2+c−420=0

c2+21c−20c−420=0

(c+21)(c−20)=0

c=20,−21

Hence, the cost of one dozen is Rs 20