Mahatma Gandhi University (MGU) 2005 B.Tech Electronics and computers Semester - Question Paper

A. 7
B. 8
C. 11
D. 12

Ans.C

20. two hours after a freight train leaves Delhi a passenger train leaves the identical station traveling in the identical direction at an avg. speed of 16 km/hr. After traveling four hrs the passenger train overtakes the freight train. The avg. speed of the freight train was?
A. 30
B. 40
C.58
D. 60
Ans. B

21. If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?
A.-5
B. 4
C. 2
D. 8
Ans. D
22. There are five red shoes, four green shoes. If 1 draw randomly a shoe what is the probability of getting a red shoe

Ans 5c1/ 9c1


23. What is the selling price of a car? If the cost of the car is Rs.60 and a profit of 10% over selling price is earned

Ans: Rs 66/-



24. 1/3 of girls, 1/2 of boys go to canteen. What factor and total number of classmates go to canteen.

Ans: Cannot be determined.


25. The price of a product is decreased by 30% . By what percentage should it be increased to make it 100%

Ans: 42.857%


26. There is a square of side 6cm . A circle is inscribed inside the square. obtain the ratio of the area of circle to square.
Ans. 11/14
27. There are 2 candles of equal lengths and of various thickness. The thicker 1 lasts of 6 hours. The thinner two hours less than the thicker one. Ramesh lights the 2 candles at the identical time. When he went to bed he saw the thicker 1 is twice the length of the thinner one. How long ago did Ramesh light the 2 candles .

Ans: three hours.
28. If M/N = 6/5,then 3M+2N = ?
29. If p/q = 5/4 , then 2p+q= ?
30. If PQRST is a parallelogram what it the ratio of triangle PQS & parallelogram PQRST .
Ans: 1:2
31. The cost of an item is Rs 12.60. If the profit is 10% over selling price what is the selling price ?
Ans: Rs 13.86/-
32. There are six red shoes & four green shoes . If 2 of red shoes are drawn what is the probability of getting red shoes
Ans: 6c2/10c2
33. To 15 lts of water containing 20% alcohol, we add five lts of pure water. What is % alcohol.
Ans : 15%
34. A worker is paid Rs.20/- for a full days work. He works 1,1/3,2/3,1/8.3/4 days in a week. What is the total amount paid for that worker ?
Ans : 57.50
35. If the value of x lies ranging from 0 & one which of the subsequent is the largest?
(a) x
(b) x2
(c) -x
(d) 1/x

Ans : (d)
36. If the total distance of a journey is 120 km .If 1 goes by 60 kmph and comes back at 40kmph what is the avg. speed during the journey?
Ans: 48kmph
37. A school has 30% students from Maharashtra .Out of these 20% are Bombey students. obtain the total percentage of Bombay?
Ans: 6%
38. An equilateral triangle of sides three inch every is provided. How many equilateral triangles of side one inch can be formed from it?
Ans: 9
39. If A/B = 3/5,then 15A =?
Ans: 9B
40. every side of a rectangle is increased by 100% .By what percentage does the area increase?
Ans: 300%
41. Perimeter of the back wheel = nine feet, front wheel = seven feet on a certain distance, the front wheel gets 10 revolutions more than the back wheel .What is the distance?
Ans: 315 feet.
42. Perimeter of front wheel =30, back wheel = 20. If front wheel revolves 240 times. How many revolutions will the back wheel take?
Ans: 360 times
43. 20% of a six litre solution and 60% of four litre solution are mixed. What percentage of the mixture of solution
Ans: 36%
44City A's population is 68000, decreasing at a rate of 80 people per year. City B having population 42000 is increasing at a rate of 120 people per year. In how many years both the cities will have identical population?
Ans: 130 years
45Two cars are 15 kms apart. 1 is turning at a speed of 50kmph and the other at 40kmph . How much time will it take for the 2 cars to meet?
Ans: 3/2 hours
46A person wants to buy three paise and five paise stamps costing exactly 1 rupee. If he buys which of the subsequent number of stamps he won't able to buy three paise stamps.
Ans: 9
47There are 12 boys and 15 girls, How many various dancing groups can be formed with two boys and three girls.
48Which of the subsequent fractions is less than 1/3
(a) 22/62
(b) 15/46
(c) 2/3
(d) 1
Ans: (b)
49There are 2 circles, 1 circle is inscribed and a different circle is circumscribed over a square. What is the ratio of area of inner to outer circle?
Ans: one : 2
50Three kinds of tea the a,b,c costs Rs. 95/kg,100/kg and70/kg respectively.
How many kgs of every should be blended to produce 100 kg of mixture worth Rs.90/kg,
provided that the quntities of band c are equal
a)70,15,15
b)50,25,25
c)60,20,20
d)40,30,30
Ans. (b)

Earning:   Approval pending.