Question

ex-2.4 ncert question 7 grade 8

Answer 1

Step-by-step explanation:

Hasan buys two kinds of cloth materials for school uniforms, shirt material that costs him Rs. 50 per metre and trouser material that costs him Rs. 90 per metre. For every 2 metres of the trouser material he buys 3 metres of shirt material. He sells the materials at 12 % and 10 % profit respectively. His total sale is Rs. 36,660. How much trouser material did he buy ?

Ans. Let ratio between shirt material and trouser material be

The cost of shirt material =

The selling price at 12% gain =

=

= =

The cost of trouser material =

The selling price at 10% gain =

=

= =

According to the question,

= 100 meters

Now, trouser material = =

= 200 metres

Hence, Hasan bought 200 metres of the trouser material.