I hope this blog will help you to boost your preparation for bank exams.
Let us discuss one question
1. Sum of CP's of two cows is Rs. 39,00's being the same. Both the cows are sold at a profit of 20% and 40% respectively, with their SP's being the same. What is the difference between CP's of both the cows.
So what is CP and SP
CP means cost price and SP means sell price
Here sum of Cp's of two cows given as 39000.
So if CP of one cow taken as x then CP of other cow is 39000-x
one of the cow sold at a profit of 20%
Then SP=x*120/100
other is sold at profit 40%
So SP=(39000-x)*140/100
Here given that Two SP's are same
So we can write it as
x*120/100=(39000-x)*140/100
1.2x=(39,000-x)1.4
1.2x=54,600-1.4x
2.6x=54600
x=54600/2.6=21,000
39000-x=18000
difference=3000
2. A reduction of 20% in the price of sugar enables Mr. Badhra to buy an extra 5 kg of it for Rs 320. The original rate of sugar is
Solution
Here take original rate of sugar be x
kilogram for 320 rupees=320/x
Given reduction of 20% in the price of suger.
New price of suger=80% of x= 4/5x
kilogram for 320 rupees=320/(4/5)x
He buy extra 5 kilogram
It can be written as
320/((4/5)x)-320/x=5
320(5/4x-1/x)=5
320(1/4x)=5
x=16
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