Question

The diameter of the wheel of a car in 70 cm. How many revolutions will it make to travel 1.65 km?





Please explain step by step​

Answer 1

$\underline{\textbf{QUESTION :-}}$

The diameter of the wheel of a car in 70 cm. How many revolutions will it make to travel 1.65 km?

$\underline{\textbf{SOLUTION :-}}$

Given    : The diameter of the wheel of a car in 70 cm.

To Find : How many revolutions will it make to travel 1.65 km?

1.65 km = 1.65 ×1000×100 cm

             = 165000 cm  

now,radius = diameter/2

          = 70/2

          =35 cm

now, circumference = 2π r

                                = 2×(22/7)×35

                                = 220 cm

it means, 220 cm = 1 revolution

      then, 165000 cm = 165000/220

                                  = 750 revolution

$\therefore \boxed{\textsf{ANSWER -750 revolution}}$

$\underline{\textbf{Some other formulas for circles}}$

Diameter of a Circle       - D = 2 × r

Circumference of a Circle  - C = 2 × π × r

Area of a Circle                - A = π × r2

Answer 2

Step-by-step explanation:

SOLUTION :-

Given : The diameter of the wheel of a car in 70 cm.

To Find : How many revolutions will it make to travel 1.65 km?

1.65 km = 1.65 ×1000×100 cm

= 165000 cm

now,radius = diameter/2

= 70/2

=35 cm

now, circumference = 2π r

= 2×(22/7)×35

= 220 cm

it means, 220 cm = 1 revolution

then, 165000 cm = 165000/220

= 750 revolution

\therefore \boxed{\textsf{ANSWER -750 revolution}}∴

ANSWER -750 revolution

\underline{\textbf{Some other formulas for circles}}

Some other formulas for circles

Diameter of a Circle - D = 2 × r

Circumference of a Circle - C = 2 × π × r

Area of a Circle - A = π × r2