Question

Write the formula for finding;
a) T.S.A of a cube,cuboid & cylinder
b) L.S.A of cube , cuboid & cylinder
c) Volume of cube ,cuboid & cylinder
d) Area of a trapezium , rhombus & general quadrilateral

Answer 1

Answer࿐

Find two consecutive odd numbers such that two fifths of the smaller number exceeds two ninths of the larger by 4

Solution :

Let one odd number be ' 2n + 1 '

This is smallest odd number .

Other consecutive odd number be ' 2n + 3 '

This is largest odd number .

A/c , " Two fifths of the smaller number exceeds two ninths of the larger by 4 "

First consecutive smallest odd number :

= 2n + 1

= 2(12) + 1

= 24 + 1

= 25

Second consecutive largest odd number :

= 2n + 3

= 2(12) + 3

= 24 + 3

= 27

Alternative : You may solve this question by taking ' x ' as smallest consecutive odd number and ' x + 2 ' as biggest consecutive odd number .

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Answer 2

Answer:

a) tsa of cube is 6a²

tsa of cuboid is 2(lb+lh+bh)

Step-by-step explanation:

b) lsa of cube is 4a²

lea of cuboid is 2h(l+b)

c) volume of cube is s³

volume of cuboid is lbh

sorry I don't know others