Question

the cross-section of a canal is in the form of the trapezium . if the top of canal is 15 m wide , the bottom is 8m and the area of cross section is 138m²,find it's depth it's my little brother's ques​

Answer 1

Answer:

Area of trapezium=1/2(a+b)×h

Where A and B are parallel sides and H is the altitude or distance between A and B.

In a canal , the floor of canal and the top water surface are parallel . Height of trapezium is the depth of canal .

138 m =1/2(15+8)×height

Height=276/23=12 m

Step-by-step explanation:

thank you

Answer 2

Answer:

As we know the area of trapezium =

2

1

×(sum of parallel side)×height

72m

2

=

2

1

×(10+6)×depth

72m

2

=

2

1

×16×depth

72m

2

=8×depth

Depth =

8

72

Depth =9m

Hope this helps you☺

And thanks a lot for thanking my answers dear ❤