A. 18 3/4 %
B. 20 %
C. 16 3/4 %
D. 19 %
Explanation:
Required % = (9/48 × 100)% = 75/4 % = 18 ¾ %
A. x/2
B. x
C. 2x
D. 4x
A. 216
B. 243
C. 215
D. 729
Explanation:
Since each ring consists of six different letters, the total number of attempts possible with the three rings is = 6 * 6 * 6 = 216. Of these attempts, one of them is a successful attempt.
Maximum number of unsuccessful attempts = 216 – 1 = 215.
A. 120
B. 260
C. 240
D. 220
Explanation with best method.
5 Steps
1.Data:
Train station platform= 36Sec
Standing platform = 20Sec
Speed of train = 54km/hr
2.Required:
Length of platform= x=???
3.Formula:
X+length of train/Train station platform
4.Solution: first for terms
Speed = 54 ×1000m/3600sec = 15 m/Sec.
Length of the train = (15 m/Sec × 20Sec = 300 m.
Let the length of the platform be x metres.
Now, x + 300m /36Sec= 15 m/Sec
x+300m= 15m/Sec×36Sec
x + 300m = 540m
x= 540m-300m
x = 240 m.
5.Result:
Length of platform=x=240m
A. 0
B. Rs. 2
C. Rs. 1.93
D. Rs. 7.20
Explanation:
Sale after 40% discount = 60% of Rs. 500 = Rs. 300
Price after 36% discount = 64% of Rs. 500 = Rs. 320
Price after next 4% discount = 96% of Rs. 320 = Rs. 307.20
Difference in two prices = Rs. 7.20
A. Rs.480
B. Rs.615
C. Rs.820
D. Rs.740
A. 4334.04
B. 4243.04
C. 4343.04
D. 4433.04
Explanation:
? = 4343.04