Length area and volume

Greatest and smallest value

Explanation:(revision)

Q1) What is meant by degree of accuracy

Accuracy is how close a measured value is to the actual (true) value. The degree of accuracy is half a unit each side of the unit of measure. ( The lower limit and upper limit has half the degree of accuracy).

Q2) Find the upper bound and lower bound for the following numbersa)1.2 correct to one decimal pointb)1.63 correct to two decimal point

A2)a) D.A= Upper limit=(1.2+0.05=1.25) Lower limit=(1.2-0.05=1.15)

b) D.A= Upper limit=(1.63+0.005=1.635) Lower limit=(1.63-0.005=1.625)

05.010

1

2

1

005.0100

1

2

1

Note: 1) To find the greatest area we take the upper limits of length and breadth

2) To find the lowest area we take the lower

limits of length and breadth

Try theseQ)The base and height of a

triangle are 16cm ,12cm respectively.

Each dimensions being given correct to the nearest whole number. Find the greatest and lowest area

Explanation:

Note:1) is maximum ,if a has maximum and b has the minimum value.

2) is minimum ,if a has minimum and b has the

maximum value3) (a-b) is maximum , if a has maximum and b

has the minimum value4) (a-b) is minimum , if a has minimum and b

has the maximum value

b

a

b

a