Question

A wheel has diameter 84cm. How many complete revolution it should take over 792m.

Quality answer Needed ​

Answer 1

Step-by-step explanation:

let revolution be n times

distance travelled = 2pie r x no. of revolution

79200cm = 2×22/7 × 42 x n

(79200 cm ×7)/ 44 ×42 =n

n = 554400/ 1848

n = 300 revolution required

and plz follow me

Answer 2

${\Huge{\underline{\underline{\mathfrak{Solution:-}}}}}$

$\bold\red{Given=>}$

Diameter of wheel = 84 cm

$\bold\green{Then=>}$

Radius of wheel = $\huge \frac{84}{2} = 42cm$

$\bold\blue{We\:know\:that,}$

Circumference of wheel = Distance covered in 1 revolution by wheel.

Circumference of circle $2\pi \: r$

$= 2 \times \frac{22}{7} \times 42$

$= 264cm$

Therefore, Number of revolution to cover 264 cm = 1

$\bold\implies$ Number of revolution to cover

$1cm = \frac{1}{264}$

$\bold\implies$Number of revolution to cover

$792m = \frac{792 \times 100}{264} (1m = 100cm)$

$\bold = 300$