Question

Vani ma'am has three Tatva books, one for chemistry, physics and biology. The chemistry book had 120 pages, the physics book has 10% more pages and the biology book has 10% fewer pages. In a class, she went through 2.5%, 25% and 50% of the pages in the chemistry, physics and biology books respectively, then how many pages in total did she cover in the class?​

Answer 1

Answer:

25%

Step-by-step explanation:

100% sure

Answer 2

Given :  chemistry book had 120 pages,

physics book has 10% more pages and the biology book has 10% fewer pages.

she went through 2.5%, 25% and 50% of the pages in the chemistry, physics and biology books respectively,

To Find :how many pages in total did she cover in the class

a) 25%

b) 5%

c) 50%

d) 2.5%​

Solution:

chemistry book  = 120 pages

physics book has 10% more pages  = 120 + (10/100)120  = 132

biology book has 10% fewer pages. = 120 - (10/100)120  = 108

Total Pages = 120 + 132 + 108 = 360

she went through 2.5%, 25% and 50% of the pages in the chemistry, physics and biology books respectively,

=   ( 2.5/100) 120  +  (25/100) 132 +  ( 50/100) 108

=  3  + 33  + 54

= 90

(90/360) * 100 = 25 %

25 % pages in total did she cover in the clas

Learn More:

Vani ma'am has three Tatva books,

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