A jeep has wheels of diameter 140m. How many revolutions can the wheel complete in 40minutes if the

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19 Aug 2021 Wheel Dia

A jeep has wheels of diameter 140m. How many revolutions can the wheel complete in 40minutes if the jeep is travelling at a speed of 220 m/s?

OPtion

1) 1750
2) 1700
3) 1280
4) 1450
5) 1200
6) 1360
7) 1450
8) 1500
9) 1350
10) None of the above

Solution

Radius of wheel = 140/2 = 70 cm
Distance travelled in one revolution = 2πr = 2 * 22/7 * 70 = 440 cm
Let the number of revolutions made by wheel is x
So total distance travelled = distance travelled in one revolution * number of revolutions
So total distance travelled = 440x cm
40 mins = 40*60 seconds
Speed of jeep = 440x/(40*60)
So 220 = 220x/(20*60)
Solve, x = 1200

Correct Option: 5 Best Solution (4)

G.S.Kantharao   3 years AGO

In 40 minutes it travels =220*40*60m
Circumference of the wheel=2*22*70/7=440m
Number of revolutions=220*40*60/440
=20*60=1200
My option is 5👈

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RAMADURAI NATESAN   3 years AGO

circufrence of wheel = 140*22/7 = 440
distanc covered in 40 minutes = 528000 m
no.of revolutions = 528000/440 = 1200

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Varun   3 years AGO

Circumference = pi diameter
= 22/7 * 140 = 440 meter
Jeep travels = 220*60*40 = 528000 meters
=> Total revolutions = 528k/440 = 1200
= Option (5)

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Billal Hossain   3 years AGO

radius = 140/2=70m
perimeter= 2*pi*r=140*pi
length= 220*40*60=528000
no of revolutions= 528000*7/(140*22)
=1200
Hence, My option is (5)

Like? Yes | No