Question
A cuboidal box has dimensions of length = 18 cm, breadth
= 15 cm, and height = 10 cm. If the breadth is increased by 20% and the height is decreased by 20%, by what percentage does the volume of the box decrease?Solution
Volume of the original box = 18 X 15 X 10 = 2700 cm3 New breadth of the box = 15 X 1.2 = 18 cm New height of the box = 10 X 0.8 = 8 cm So, new volume of the box = 18 X 18 X 8 = 2592 cm3 So, percentage reduction in volume = {(2700 - 2592) ÷ 2700} X 100 = 4% Alternate solution Let the length, breadth and height of the cuboid originally be 'l' units, 'b' units and 'h' units, respectively Therefore, original volume of the cuboid = 'lbh' cubic units New breadth of the cuboid = '1.2b' units New height of the cuboid = '0.8h' units New volume of the cuboid = 1.2b X 0.8h X l = '0.96lbh' cubic units Required percentage = {(lbh - 0.96lbh)/lbh} X 100 = 4%
Lactose is:
(I) Bacteria
(a) 0.9- 0.95
(ii) Yeast
(b) Staphylococcus
(iii) molds
(C ) Entamoeba
(iv) Protozoa
(d) 0.7-0.8
In batch fermentation:
Potable water should be tested as per which standard?
In bread making, microorganisms are useful in development of ______ and ______ of the product (Both blanks need to be correct).
The acid present in lemons is:
A process uses gases like CO2 at high pressure to extract food components known as
a) Solvent extraction
b) Supercritical...
Which of the following is an advantage of food processing?
Which of the following compound is responsible for flavor of banana
a) Pectyl acetate
b) Benzaldehyde
c) I...
(i) Virus (a) E.coli
(ii) protozoan (b) hepatitis A
(iii) bacteria (C ) plasmodium
(iv) fungi (d) Ringworm
