Question

The diameter of the wheel of a bus is 1.4 m . The wheel makes 10 revolution in 5 second.speed?

Answer 1

Answer:

8.8 m/s

Step-by-step explanation:

radius of wheel = 0.7m

circumference = 2×22/7×0.7 =4.4m

total dist. covered in 10 revolutions = 4.4x10=44m

speed= dist/time= 44/5=8.8m/s

Answer 2

Step-by-step explanation:

Given :-

The diameter of the wheel of a bus is 1.4 m . The wheel makes 10 revolution in 5 seconds.

To Find :-

Find the speed of the wheel of the bus ?

Solution :-

Given that

The diameter of the wheel of the bus (d) = 1.4 m

We know that

Radius = Diameter / 2

=> r = 1.4 /2 = 0.7 m

The distance covered by the wheel in one revolution = Circumference of the circle

=> C = 2πr units

=> C = 2×(22/7)×0.7 m

=> C = 2×22×0.1 m

=> C = 4.4 m

The distance covered by the wheel in one revolution = 4.4 m

The total distance covered by the wheel in 10 revolutions = 10×4.4 m = 44 m

Time taken by the wheel for 10 revolutions

= 5 seconds

We know that

Distance = Speed × Time

=> Speed = Distance / Time

The speed of the wheel of the bus

=> 44/5 m/s

=> 8.8 m / s

Answer :-

The speed of the wheel of the bus = 8.8 m/s

Used formulae:-

→ Circumference of the circle(C) = 2πr units

→ Radius = Diameter / 2

→ Distance = Speed × Time

→ π = 22/7