Question

solve. this question in attachment ​

Answer 1

$\huge \star \mathtt \red{ \underline{AnsWEr}} \star$

$\blue { \tt{Given }}$

• diameter of weel of the car , D1 = 80 cm

• Then, radius if wheel of car, r = D1 / 2 = 80/2 = 40 CM

• circumference of wheel of circle =circumference of circle

• $↪2\pi \: r \:$
• $↪2 \times \frac{22}{7} \times 40$
• $↪ \frac{1760}{7} cm$

Also Given,

• Speed of car = 66 km/ h

• $↪ \frac{66 \times 1000}{60} \: \: \: \: m \: \: \: per \: \: min \:$
• 1100 m \ min = 110000 CM \ min

Now,

• wheel of the car moves in 1 min = 110000 CM

• :- wheel of the car moves in 10 min = 1100000cm

Then,

↪Number of complete revolution = distance moved in 1 min by wheel of the car / circumference of wheel of the car

$↪ \frac{1100000}{ \frac{1760}{7} } = \frac{7700000}{1760} = 4375$

Hence,

• The wheel makes 4375 complet revolution in 10 min .

Answer 2

$\huge \star \mathtt \purple{ \underline{AnsWEr}} </p><p>$

$\blue { \tt{Given }}$

diameter of weel of the car , D1 = 80 cm

Then, radius if wheel of car, r = D1 / 2 = 80/2 = 40 CM

circumference of wheel of circle =circumference of circle

$↪2\pi \: r \:↪2πr</p><p>↪2 \times \frac{22}{7} \times 40$

$↪ \frac{1760}{7} cm$

Also Given,

Speed of car = 66 km/ h

$↪ \frac{66 \times 1000}{60} \: \: \: \: m \: \: \: per \: \: min \:$

1100 m \ min = 110000 CM \ min

Now,

wheel of the car moves in 1 min = 110000 CM

:- wheel of the car moves in 10 min = 1100000cm

Then,

↪Number of complete revolution = distance moved in 1 min by wheel of the car / circumference of wheel of the car

$↪ \frac{1100000}{ \frac{1760}{7} } = \frac{7700000}{1760}$

Hence,

The wheel makes 4375 complet revolution in 10 min .