Question

1. The diameter of a wheel of a car is 70 cm. Find the distance covered by the car during the time in which the wheel makes 500 revolutions.

2. Find the perimeter of a rectangle if length is 24cm and breadth is 15cm.



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Answer 1

Ans 1

radius - 35

Formula of Circle- πr²

22/7×35×35

22/7×1225

175×22

3850

Step-by-step explanation:

Ans 2

length × Breath

24×15=360

Answer 2

Answer:

1. Radius of the wheel =

$\\ \frac{70}{2} cm \: = 35cm$

Circumference of the wheel

$= 2\pi \: r$

$= (2 \times \dfrac{22}{7} \times 35)cm$

= 2×22×5 cm

= 220 cm = 2.20 cm

In one revolution, the wheel covers a equal distance to its circumference.

∴ distance covered by the wheel in 1 revolution= 2.20 m

∴ distance covered by the wheel in 500 revolutions = (2.20 × 500)m

= 110000m

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2. Length of the rectangle = 24cm

Breadth of the rectangle = 15cm

As we know,

Perimeter = 2(Length + breadth)cm

Perimeter of the rectangle = 2( 24 + 15 ) cm

= 2 × 39 cm

= 78cm