Speed, Time and Distance
 A speed of 22.5 m/sec. is the same as ?

 40.5 km/hr.
 81 km/hr.
 36.8 km/hr .
 72 km/hr.

View Hint View Answer Discuss in Forum
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.
 A speed of 55 m / sec. is the same as ?

 198 km/hr.
 11 km/hr.
 15 ^{5}/_{18} km/hr.
 275 km/hr.

View Hint View Answer Discuss in Forum
Speed in km/hr = speed in m/sec x (18 / 5 )
Speed in km/hr = (55 x 18 /5 ) km/hrCorrect 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.
 A speed of 30.6 km/hr. is the same as ?

 5.1 m/sec.
 8.5 m/sec.
 110.16 m/sec.
 1.7 m/sec.

View Hint View Answer Discuss in Forum
Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 30.6 x 18 /5 ) m/secCorrect 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
 A speed of 36 km/hr. is the same as ?

 10 m/sec.
 7.2 m/sec.
 2 m/sec.
 129.6 m/sec.

View Hint View Answer Discuss in Forum
Speed in m/sec = speed in km/hr x (5 / 18 )
Speed in m/sec = ( 36 x 5/18 ) m/secCorrect 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
 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.?

 64
 8
 4
 Cannot be determined

View Hint View Answer Discuss in Forum
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.