Question

convert the following fractions into decimal
81/16​

Answer 1

5.621212121...

Step-by-step explanation:

16/81 is equal to 5.62121...

21 recurring

Answer 2

Answer:

Step-by-step explanation:

For the cylindrical well diameter is 7m and depth is 30m

Here r=

2

d

​

=

2

7

​

 and height =30m

For the cubical platform, length l=30m, breadth =10m and height =X m

volume of soil obtained by digging the well = volume of soil used to prepare the platform.

⇒πr

2

h=l×b×h

=

7

22

​

×

2

7

​

×

2

7

​

×30=30×10×X

X=

7

22

​

×

2

7

​

×

2

7

​

×

30×10

30

​

X=3.85m

Hence height of the platform =3.85m