When there is 12.5% fall in price of a chocolate bar, a person is able to purchase 40 more in Rs. 80

M4maths Previous Puzzles

18 Oct 2022 Percentage

When there is 12.5% fall in price of a chocolate bar, a person is able to purchase 40 more in Rs. 800. The cost (in Rs) of 100 chocolate bars at reduced price is:

OPtion

1) 350
2) 280
3) 320
4) 500
5) 200
6) 420
7) 240
8) 560
9) 250
10) None of these

Solution

Let the initial price of chocolate bar =Rs. x and Number=n
Then, x*n = 800
Also, 0.875x*(n+40) = 800
⇒ 0.875x*n + 35x = 800
0.875*800 + 35x = 800
x = 20/7
Cost of 100 chocolate bar at reduced price = 100*0.875*(20/7) = 250
Correct Option 9)

Correct Option: 9 Best Solution (3)