Question

8. Rao bought notebooks at the rate of 4 for ₹35 and sold them at the rate of 5 for ₹58.
Calculate
(1) his gain percentage.
(ii) the number of notebooks he should sell to earn a profit of ₹171.​

Answer 1

For 35 Rs, the gain was 58-35 = 23 Rs
For 1 Rs, the gain was 23/35
For 100 Rs, the gain was (23/35)(100) = 65.71 %

Answer 2

Correct Question

no of note book when they profit of "170"

Given

A word problem from profit and loss

CP=35

sp=58

To Find

1. Gain percentage
2. no of note book when they profit of 170

Solution

Gain percentage per book

Here,we clearly see in given Sp>Cp

Therefore

Gain= sp-cp

=58-35

=23

Now Gain% is

Gain%=$\frac{Gain}{cp}\times\:100$

=$\frac{23}{35}\times100$

=65.71%

For whole Book Gain %

CP=4×35=140

Sp=58×5=290

Gain =150

=$\frac{150}{140}\times100$

=10.71%

(2).we have to find no of notebook

profit=170

Let the no book be n

Profit = no of book × rate

170 =n×5

n=34