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Find the area of the rectangles whose sides are:

(a) 3 cm and 4 cm

(b) 12 m and 21 m

(c) 2 km and 3 km

(d) 2 m and 70 cm

Answer:

We know that

Area of rectangle = Length × Breadth

(a) l = 3 cm and b = 4 cm

Area = l × b = 3 × 4

= 12 cm²

(b) l = 12 m and b = 21 m

Area = l × b = 12 × 21

= 252 m²

(c) l = 2 km and b = 3 km

Area = l × b = 2 × 3

= 6 km²

(d) l = 2 m and b = 70 cm = 0.70 m

Area = l × b = 2 × 0.70

= 1.40 m²

"hello students welcome to lido qna video
session i am saf your math tutor
and question for today is a match box
measures
4 centimeter by 2.5 centimeter by 1.5
centimeter
what will be the volume of the packet
containing 12 such boxes
so data given to us is the length
breadth and height of the matchbox
that is length is
4 centimeter breadth of the matchbox
that is b
2.5 centimeter and height
that is h that is equal to 1.5
centimeter
now to find the volume we have
the volume of the cuboid
as matchbox is the cuboidal in shape we
should take
volume of the cuboid
length into breath into height
so 4 into 2.5 into 1.5
that is centimeter cube
this is the volume of one match box
now it is as that what will be the
volume of twelve such boxes
so volume of 12 such boxes
you just multiply 15 into 12
and you will get 15 into 12 that is 180
centimeter
cube that is your
required volume of 12 match boxes
therefore volume of 12 match boxes is
180 centimeter cube
this is our final answer if you have any
query you can drop it in our comment
section
and subscribe to lido for more such q a
thank you for watching
"

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