Question

find the area of the shaded portion of fig. 14.27​

Answer 1

Answer:

57

Step-by-step explanation:

First take the horizontal plane ,

here the breadth is 1 and length is 18 as given in the figure.

So it is the rectangular plane.

Area of rectangle = length × breadth

= 18 × 1

= 18

Now take the vertical plane ,

here the breadth is 3 and length is ( 14 - 1 ) i.e. 13 as given in the figure alongside.

Area of rectangle = length × breadth

= 13 × 3

= 39

Area of the total coloured portion = 18 + 39

= 57

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Answer 2

Answer:

57

Step-by-step explanation:

area of whole fig. =18×14

=252

area of not shaded part=(18-3)×(14-1)

=15×13 =195

so area of the shaded part= area of whole fig. -area of not shaded part

=252-195

=57