SSC CGL 2022 PYQ — Question 67

 The correct answer is option 4 i.e. 68

Explanation:

Let the C.P. of wheat per kg be x

Total quantity of wheat in Rs.2720 = $2720\over x$

New price = x - 15% of x = ${85x\over 100} = {17x\over 20}$

New quantity of wheat in Rs. 2720 =$2720\over {17x\over 20}$

⇒ 2720 × $({20\over 17x})$ = $3200\over x$

Now, ${3200\over x} - {2720\over x}$= 6

⇒ $480 \over x$ = 6

⇒ x = 80

New price of wheat per kg = 80 × $({17\over 20})$ = 68

Hence the new price of wheat per kg is 68.