Question

sonu buys 40kg of wheat at rs.12.50per kg and 30kg of wheat at rs.14per kg.at what rate per kg should he sell the mixture to gain 5% on the whole.

Answer 1

total money used is 40*12.5+30*14
=500+420
=920
then if he has to gain 5%increment
then amount will be 920*5%
=46
so means there are so many chance according to our will
if we increments the rate of 12.5 rate wheat by .5 then we have 20 rupees
now increments the rate by .86 of 14 rupees rate wheat then we have approx we have 26 more
so 20+26=46 me we gain 5%profit

Answer 2

STEP 1= CP Of FirsT Variety Of Wheat = 40*6.25 = Rs 250

CP Of Second Variety Of Wheat = 30*7 = Rs 210

Total CP = 250+210 = Rs 460 For 40+30 = 70 kg

To Gain 5% = 460+5/100*460 = Rs 483 For 70 kg

Rate At 1 kg = 483/70 = Rs 6.9 per kg

STEP 2 = cost price of 1st wheat brought = 40 x 6.25 =Rs 250

cost price of 2nd wheat brought =30 x 7 = Rs 210

total cost price =250+210 =Rs 460

where,40kg+30kg=70 kg

profit on whole is 5% = 460+5/100 x 460 = Rs 483 for 70 kg

cost per kg is = 480/70 =Rs 6.9 per kg