Q21. Bablu alone can do a piece of work in 10 days. Ashu alone can do it in 15 days. The total wages for the work in Rs.5000 .how much should Bablu be paid of they work together for entire duration of the work
a) 4000
b) 3000
c) 5000
d) 2000
View Answer and Explanation
Ans. b
Bablu’s 1 day’s work =1/10
Ashu’s 1 day’s work = 1/15
Ratio of wages of A and B =1/10 : 1/15=3:2
Bablu’s share= (5000* 3/5)= Rs.3000
Q22. Average of 3 numbers ABC is given as 48. Average of A,B,C,D is 46. Its given that E is having 3 more than D, then Average of B,C,D,E is 45. What is the score of A ?
a) 46
b) 47
c) 48
d) 49
View Answer and Explanation
Ans. b
A + B + C) = 48 * 3 = 144
(A + B + C + D) = 80 * 4 = 184
D = 184 – 144 = 40
E = D + 3 = (40 + 3) = 43 kg
(B + C + D + E )= (45 * 4) = 180
(B + C) = 180 – 43 – 40 = 47
A = 184 – 97 – 40 = 47
Q23. Raj travels a part of journey by taxi paying 15 per km and rest by train paying 21per km. If he travels a total of 450 Km and pay Rs.8130 then the distance travelled by raj in train ?
a) 230
b) 260
c) 190
d) 180
View Answer and Explanation
Ans. a
Let the distance traveled by train = p
Distance travelled by taxi = (450-p)
Now, (450-p)15 + p21=8130
On solving p=230
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Q25. A boy buys 18 sharpeners (brown or white) for Rs. 100. For every white sharpener, he pays one rupee more than the brown sharpener. What is the cost of white sharpener & how much did he buy ?
a) 5, 13
b) 5, 10
c) 6, 10
d) None of these
View Answer and Explanation
Ans. c
Let boy bought p white sharpeners @ Rs (q+1) and (18-p) brown
sharpeners @ Rs q per sharpener, then
p(q+1)+p(18-p)=100
p= 100-18q
Only integral value of p less than 18 will be 10.
then p=10, q=5
so he bought 10 white sharpeners @ Rs 6 per sharpeners and 8 brown
sharpeners @ Rs 5 per sharpener.
Ans is 6,10
I want solution for 155 question
Solution for Question 15:
The difference in 1 box = 45 – 27 = 18
Extra amount he has to pay to buy 27 boxes this year = 27 * 18 = 486$
Sol: 46
Let x, y & z be no of boxes George, Mark or Henry can paint in one day.
From given data,
20x + 20y = 720, ∴ x + y = 36 …(1)
24y + 24z = 720, ∴ y + z = 30 …(2)
15x + 15z = 720, ∴ x + z = 48 …(3)
Solving (1), (2) & (3),
x = 27
y = 9
z = 21
Now, to calculate no of boxes painted –
Boxes painted = 4x + 8y + 8z
Boxes painted = 4×27 + 8×9 + 8×21
Boxes painted = 108 + 72 + 168
Boxes painted = 348 boxes