exam Maths Puzzle

A bus overtakes two boys who are walking in the direction of the bus at 2 km/hr and 4 km/hr in 9 sec and 10sec respectively. The length of the bus and its speed are:

A.

50m and
55
9
m/s

B.

80m and
88
9
m/s

C.

70m and
77
9
m/s

D.

60m and
66
9
m/s

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exam Other Question

Two boats, traveling at 5 and 10 kms per hour, head directly towards each other. They begin at a distance of 20 kms from each other. How far apart are they (in kms) one minute before they collide?

A.

1
12

B.

1
6

C.

1
4

D.

1
3
In a kilometer race, If Abhishek gives Bharti a 40m start, Abhishek wins by 19sec. But if Abhishek gives Bharti a 30 sec start, Bharti wins by 40 m. Find the time taken by Bharti to run 5,000m?

A.

150 sec

B.

450 sec

C.

750 sec

D.

825 sec