A. 4:8
B. 1:4
C. 6:2
D. 3:1
A. 81 min
B. 108 min
C. 144 min
D. 192 min
Explanation:
Let the slower pipe alone fill the tank in x min.
Then, faster pipe will fill it in x/3 min.
1/x + 3/x = 1/36
4/x = 1/36 => x = 144 min.
A. Rs. 5000
B. Rs. 10000
C. Rs. 12000
D. Rs. 16000
Explanation:
Labelled price be Rs. 100
S.P in 1st case = Rs. 80
S.P in 2nd case = Rs. 75
Saving is Rs. 5 labelled price = Rs. 100
Saving is Rs. 500 labelled price
= Rs. (100/5 × 500) = Rs. 10000
A. 32256
B. 24000
C. 24936
D. 25640
X * (96/100) = 23040
X = 240 * 100
X = 24000
A. 38
B. 35
C. 10
D. 28
Let z = 4y-1
When x = 14, y = 2, z = (4*2) – 1 = 7
Now, x varies directly as z = 4y-1
When y = 5, z = (4*5) – 1 = 19
x 14 7
y – 19
Therefore, x = (14*19)/7 = 38
A. 30, 19
B. 21, 37
C. 15, 34
D. 15, 27
Let the two numbers be 5x and 9x.
(5x-5)/(9x-5) = 5:11
(5x-5)*11 = (9x-5)*5
55x – 55 = 45x – 25
10x = 30
x = 3
Therefore, the numbers are 15 and 27.
A. 15%
B. 16 1/6%
C. 16 2/3%
D. 20%
Explanation:
Clearly, the retailer gets 1 dozen out of 6 dozens free.
Equivalent discount = 1/6 * 100 = 16 2/3%.