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GATE Questions

A) 90 mts | B) 150 mts |

C) 120 mts | D) 100 mts |

Explanation:

We know that

distance= speed * time

d =

d= 100 mts.

A) Father = 50; Son =14 | B) Father = 40; Son =24 |

C) Father = 60; Son =4 | D) Father = 48; Son =16 |

Explanation:

Let the present age of the man be 'P' and son be 'Q',

Given, P + Q = 64 or Q = (64 - P)

Now the man says "I am five times as old as you were, when I was as old as you are",

So, P = 5[B - (P - Q)]

We get 6P = 10Q,

Substitute value for Q,

6P = 10(64 - P),

Therefore P = 40, Q = 24.

A) 38 | B) 39 |

C) 40 | D) 41 |

Explanation:

Given M.P=45,S.P=42, Profit = 0.05

Let C.P=x , Then

Profit = (42-x)/x = 0.05

=> x = 40.

A) Economic development in India | B) Health development in India |

C) Development of airports in India | D) Rural development in India |

A) 9 days | B) 11 days |

C) 13 days | D) 15 days |

Explanation:

Ratio of times taken by A and B = 100 : 130 = 10 : 13.

Suppose B takes x days to do the work.

Then, 10 : 13 :: 23 : x => x = ( 23 x 13/10 ) => x = 299 /10.

A's 1 day's work = 1/23 ;

B's 1 day's work = 10/299 .

(A + B)'s 1 day's work = ( 1/23 + 10/299 ) = 23/299 = 113 .

Therefore, A and B together can complete the work in 13 days.