[B].
[C].
[D].
Answer: Option E
Explanation:
A x 2 + 1, B x 3 + 1, C x 2 + 1, D x 3 + 1 and so on.
So, 356 is wrong.
A. 4 : 3
B. 3 : 2
C. 6 : 5
D. 7 : 6
E. None of these
Explanation:
Let x be the investment of Rayan in 6% and y be in 7%
x(6)(n)/100 = y(7)(n)/100
=> x/y = 7/6
x : y = 7 : 6
[B].
[C].
[D].
Answer: Option D
Explanation:
Simran : Nanda = (50000 x 36) : (80000 x 30) = 3 : 4.
| Simran’s share = Rs. | 24500 x | 3 | = Rs. 10,500. | ||
| 7 |
[B].
[C].
[D].
Answer: Option C
Explanation:
Let the man’s rate upstream be x kmph and that downstream be y kmph.
Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.
| x x 8 | 4 | = (y x 4) | |||
| 5 |
| 44 | x =4y | |
| 5 |
| y = | 11 | x. |
| 5 |
| Required ratio = | y + x | : | y – x | ||||
| 2 | 2 |
| = | 16x | x | 1 | : | 6x | x | 1 | ||||
| 5 | 2 | 5 | 2 |
| = | 8 | : | 3 |
| 5 | 5 |
= 8 : 3.
A. Rs. 81.60
B. Rs. 160
C. Rs. 1081.60
D. None of these
Explanation:
Principle = Rs.(8000/8) = Rs. 1000
Therefore, C. I = Rs. [{ 1000 × (1 +4/100)2 – 1000}]
= Rs. 81.60
| 4 | 4 | % |
| 7 |
[B].
| 5 | 5 | % |
| 11 |
[C].
[D].
Answer: Option B
Explanation:
Cost Price (C.P.) = Rs. (4700 + 800) = Rs. 5500.
Selling Price (S.P.) = Rs. 5800.
Gain = (S.P.) – (C.P.) = Rs.(5800 – 5500) = Rs. 300.
| Gain % = | 300 | x 100 | % | = 5 | 5 | % | |
| 5500 | 11 |
[B].
[C].
[D].
Answer: Option C
Explanation:
| Speed = | 45 x | 5 | m/sec | = | 25 | m/sec. | ||
| 18 | 2 |
Time = 30 sec.
Let the length of bridge be x metres.
| Then, | 130 + x | = | 25 |
| 30 | 2 |
2(130 + x) = 750
x = 245 m.
Video Explanation: https://youtu.be/M_d8WufJWKc