## Speed, Time and Distance

#### Speed, Time and Distance

1. A speed of 22.5 m/sec. is the same as ?
1. 40.5 km/hr.
2. 81 km/hr.
3. 36.8 km/hr .
4. 72 km/hr.

1. Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = (22.5 x 18 /5 ) km/hr.

##### Correct Option: B

Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = (22.5 x 18 /5 ) km/hr
= 81 km/hr.

1. A speed of 55 m / sec. is the same as ?
1. 198 km/hr.
2. 11 km/hr.
3. 15 5/18 km/hr.
4. 275 km/hr.

1. Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = (55 x 18 /5 ) km/hr

##### Correct Option: A

Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = ( 55 x 18 /5 ) km/hr
= 198 km/hr.

1. A speed of 30.6 km/hr. is the same as ?
1. 5.1 m/sec.
2. 8.5 m/sec.
3. 110.16 m/sec.
4. 1.7 m/sec.

1. Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 30.6 x 18 /5 ) m/sec

##### Correct Option: B

Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 30.6 x 18 /5 ) m/sec
= 8.5 m/sec

1. A speed of 36 km/hr. is the same as ?
1. 10 m/sec.
2. 7.2 m/sec.
3. 2 m/sec.
4. 129.6 m/sec.

1. Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 36 x 5/18 ) m/sec

##### Correct Option: A

Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 36 x 5/18 ) m/sec
= 10 m/sec

1. Suresh started cycling along the boundaries of a square field from corner point A. After half an hour, he reached the corner point C, diagonally opposite to A, if his speed was 8km/hr , what is the area of the field in square km.?
1. 64
2. 8
3. 4
4. Cannot be determined

1. Length of two sides of square
= 8 x 1/2 km.
= 4 km.

##### Correct Option: C

Length of two sides of square
= 8 x 1/2 km.
= 4 km.

∴ Area of the field = 2 x 2 sq. km
= 4 sq. km.