Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q1. | The circumference of the back-side wheel of a vehicle is 1 m greater than that of. front-side wheel. To travel 600 m the front wheel rotates 30 times more than the back wheel. what should be the circumference of the front wheel ? |
| 1) | 5 m. | 2) | 2 m. |
| 3) | 3 m. | 4) | 4m |
| 5) | None of thes | ||
Answer : 4m
Explanation :
Explanation :
Let the circumference of front wheel be x metres.
Then, Circumference of rear wheel = (x - 1) metres
∴600/x−600/(x+1)=30
⇒1/x(x+1)=1/20
⇒x(x−1)=20
⇒(x2+x−20)=0
⇒(x+5)(x−4)=0⇒x=4m
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