Arun makes a popular brand of cubical ice cream bar of length, breadth and thickness of 7cm, 9cm and 5cm respectively. To cut the cost company decided to reduce the volume by 19%. Thickness remains the same bat length ant the width decreased by the same percentage. What is the new breadth?
Answers
Answer:
Arun makes a popular brand of cubical ice cream bar of length, breadth and thickness of 7cm, 9cm and 5cm respectively. To cut the cost company decided to reduce the volume by 19%. Thickness remains the same bat length ant the width decreased by the same percentage. What is the new breadth?
Therefore the new breadth of the new chocolate bar is 9 cm
Step-by-step explanation:
The volume of this ice cream bar is 7 cm by 9 cm by 5cm
7cm × 9cm × 5cm = 315cm³
This volume when decrease by 19 % will become:
100% - 19% = 81%
81/100 × 315cm³ = 255.15cm³
255.15cm³ is the new volume of the ice cream bar
If the thickness remains the same but length and width reduced by the same percentage.
Therefore length decreased by 19% ⇒ 81/100 × 7cm = 5.67cm
Let the new breadth be ycm and the thickness 5 cm
Therefore:
5.67cm × y cm x 5cm = 255.15cm³
28.35y cm³ = 255.15cm³
y = 255.15/28.35
y = 9 cm
Therefore the new breadth is 9 cm
Answer:
4.5
Step-by-step explanation:
volume v=l*b*t
new volume is 81% of old v.
therefore new vol = 81%(v)=l*b*t
=> 81% (l*b*t) = l*b*t
=> 81% (l*b) = l * b
since the change in new l and b is the same. hence consider change to be x.
=> 81% (l*b) = l*b
81%=x^2
x=9%.
9% change in 5cm width is 0.45
therefore new width is 5-0.45=4.55cm