[B].
[C].
[D].
Answer: Option D
Explanation:
The numbers are 13, 23, 33, 43 etc. So, 124 is wrong; it must have been 53i.e., 125.
[B].
[C].
[D].
Answer: Option B
Explanation:
| Speed = | 300 | m/sec = | 50 | m/sec. | ||
| 18 | 3 |
Let the length of the platform be x metres.
| Then, | x + 300 | = | 50 | ||
| 39 | 3 |
3(x + 300) = 1950
x = 350 m.
[B].
[C].
[D].
Answer: Option A
Explanation:
Ratio of rates of working of A and B = 2 : 1.
So, ratio of times taken = 1 : 2.
| B’s 1 day’s work = | 1 | . |
| 12 |
| A’s 1 day’s work = | 1 | ; (2 times of B’s work) |
| 6 |
| (A + B)’s 1 day’s work = | 1 | + | 1 | = | 3 | = | 1 | . | ||
| 6 | 12 | 12 | 4 |
So, A and B together can finish the work in 4 days.
[B].
[C].
[D].
Answer: Option D
Explanation:
| Speed = | 60 x | 5 | m/sec | = | 50 | m/sec. | ||
| 18 | 3 |
Length of the train = (Speed x Time).
| Length of the train = | 50 | x 9 | m = 150 m. | |
| 3 |
Video Explanation: https://youtu.be/q6Xy5JXNp-k
[B].
[C].
[D].
Answer: Option D
Explanation:
T.D. = P.W. x B.G. = 576 x 16 = 96.
A. 10%
B. 10.5%
C. 12%
D. None of these
Explanation:
Difference in C.I. and S.I for 2 years = (696.30 – 660) = Rs. 36.30.
S.I for one year = Rs. 330.
S.I. on Rs. 330 for 1 year = Rs. 36.30
Rate = (100 * 36.30)/(330 * 1) = 11%
[B].
[C].
[D].
Answer: Option C
Explanation:
Let the speed of each train be x m/sec.
Then, relative speed of the two trains = 2x m/sec.
| So, 2x = | (120 + 120) |
| 12 |
2x = 20
x = 10.
| Speed of each train = 10 m/sec = | 10 x | 18 | km/hr = 36 km/hr. | ||
| 5 |