00:33:57 NCERT Miscellaneous Exercise Question 12 A solution of 8% boric acid is to be diluted by adding a 2% boric acid solution to it. The resulting mixture is to be more than 4% but less than 6% boric acid. If we have 640 litres of the 8% solution, how many litres of the 2% solution will have to be added?
00:45:57 NCERT Miscellaneous Exercise Question 13 How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?
CBSE: Central Board of Secondary Education State Board:State Government Recognized Board Andhra Pradesh Board of secondary Examination Andhra Pradesh Intermediate Public Examination Assam Board of Secondary Education Bihar School Examination Board Chhattisgarh Board of Secondary & Higher Secondary Education Goa Board of Secondary & Higher Secondary Education Gujarat Secondary Education Board Haryana Board of Education Himachal Pradesh Board of School Education J&K State Board of School Education Karnataka Secondary Education Examination Board Kerala Board of Public Examinations Maharashtra State Board Madhya Pradesh Board of Secondary Education Punjab School Education Board Rajasthan Board of Secondary Education Telangana Board of Secondary Education Tripura Board of Secondary Education UP Board of High School & Intermediate Education Uttarakhand Board of School Education West Bengal Board