A. Rs.45
B. Rs.78
C. Rs.44
D. Rs.40
π (152 – 132) = 176
176 * 1/4 = Rs.44
A. 120
B. 240
C. 360
D. 480
Explanation:
2 24 – 36 – 40
——————–
2 12 – 18 – 20
——————–
2 6 – 9 – 10
——————-
3 3 – 9 – 5
——————–
1 – 3 – 5
L.C.M = 2 * 2 * 2 * 3 * 3 * 5 = 360.
A. 70, 10 kmph
B. 35, 27 kmph
C. 50, 60 kmph
D. 45, 55 kmph
Explanation:
Speed of the boat in still water = (60+80)/2 = 70 kmph. Speed of the stream = (80-60)/2 = 10 kmph.
A. 9 1/11 %
B. 10%
C. 11%
D. 11 1/9 %
A. 65
B. 69
C. 72
D. None of these
Average = (76 + 65 + 82 + 67 + 85)/5 = 375/5 = 75
A. 40 days
B. 50 days
C. 60 days
D. 70 days
(A+B)’S 1 day’s work = [1/15−1/20]=1/60
A alone can finish it in 60 days
A. 4
B. 5
C. 6
D. 8
E. None of these
Explanation:
If Bilal gives ‘x’ marbles to Arslan then Bilal and Arslan would have V – x and A + x marbles.
V – x = A + x — (1)
If Arslan gives 2x marbles to Bilal then Arslan and Bilal would have A – 2x and V + 2x marbles.
V + 2x – (A – 2x) = 30 => V – A + 4x = 30 — (2)
From (1) we have V – A = 2x
Substituting V – A = 2x in (2)
6x = 30 => x = 5.