Question

maths questions pls solve properly​

Answer 1

Answer:

2.28 cm

3.Rs 56, 320/-

4.250 rotations

Step-by-step explanation:

2.Given,circumference=176 cm

To find:The radius.

Now we know that the formula to calculate the circumference is 2πr.

Let us take C as circumference,

So,

C=2πr

176=2πr

176/2=22/7 ×r

88×7=22r

616/22=r

Therefore,r=28.

The radius of the circle, therefore is 28 cm.

__________________________

3.Radius of the circular garden=

56 cm.

First we will find the circumference whose formula is 2πr.

So,

2×22/7×56=352 cm

Now to put a 4-round fence we need the measure which is 4 times the circumference, =4×352

=1048 cm.

The cost of putting fence for 1m^2= Rs 40/-

Therefore, the cost of putting a 4 round fence around the circular garden=40×1048

=Rs 56, 320/-

__________________________

4.Diameter of wheel=1.4 m

1 rotation=Its circumference

Circumference=πd(or 2πr)

=22/7×1.4

=22×0.2

=4.4 m

Means in 1 rotation

It will move=4.4 m

So total rotation on 1.1 km

1.1 km=1100 m

Total Rotation=1100/4.4=250

Hence the wheel complete as the cart travels 1.1 km 250 rotations.

Hope this Helps:)