```
```1)What is 180 kmph as metres per second?

A)15 m /sec

B)20 m /sec

C)45 m /sec

D)50 m /sec

**Answer:**D)50 m /sec

**Explanation:**
180 kmph = ( 180 * 5/18) m/sec

= 50 m /sec.

```
```2) What is 55 m/sec as km/hr?

A) 198 km/hr

B) 188 km/hr

C) 178 km/hr

D) 126 km/hr

**Answer:**A) 198 km/hr

**Explanation:**
55 m/sec = (55 * 18 / 5 ) km/hr

= 198 km/hr.

```
```3) A train running at the speed of 90 km/hr crosses a pole in 9 seconds. What is the length of the train?

A) 245 metres

B) 225 metres

C) 235 metres

D) 255 metres

**Answer:**B) 225 metres

**Explanation:**
Speed =(90*5/18)m/sec=25m/sec

As per the formula

length of the train =(Speed x Time).

So length of the train=(25*9)m= 225m.

```
```4) A train having a length of 250 m passes a post in 25 seconds. How long will it take to pass a platform having a length of 650 m?

A) 120 sec

B) 90 s

C) 89 s

D) 80 s

**Answer:**B) 90 s

**Explanation:**
v = 250/25 (where v is the speed of the train)

= 10 m/s

v is the speed of the train

t = (250+650)/10

= 90 seconds