7
Q:

Two trains 85 m and 75 m long are running in same direction with speeds of 62 km/hr and 44 km/hr respectively. In what time will the first train cross the second train ?

 A) 22 sec B) 32 sec C) 42 sec D) 52 sec

Explanation:

Given that,

1st train speed = 62 km/hr

2nd train speed  = 44 km/hr

Hence the relative speed of two trains is : 62-44 = 18 km/hr = $18×518$ m/s = 5 m/s.

There fore, the first train crosses the second train i.e (85+75)mts of distance with a speed of 5m/s in,

time = 32 sec.

Q:

Which of the following pairs are co-primes?

 A) 59, 97 B) 348, 296 C) 3025, 4920 D) 114, 213

Explanation:

0 118
Q:

A man travels from point A to B at 40 km/hr and returns from B to A at 60 km/hr. What is his average speed during the whole journey?

 A) 55 km/hr B) 45 km/hr C) 48 km/hr D) 50 km/hr

Explanation:

0 120
Q:

The distance between two stations A and B is 575 km. A train starts from station ‘A’ at 3:00 p.m. and moves towards station ‘B’ at an average speed of 50 km/h. Another train starts from station ‘B’ at 3:30 p.m. and moves towards station ‘A’ at an average speed of 60 km/h. How far from station ‘A’ will the trains meet ?

 A) 275 km B) 325 km C) 300 km D) 225 km

Explanation:

0 164
Q:

A car covers a distance of 20 km in 15 minutes. If its speed is decreased by 10 km/hr, then what will be the time (in minutes) taken by it to cover the same distance?

 A) 150/11 B) 120/7 C) 130/11 D) 150/13

Explanation:

2 150
Q:

A boy walking at the speed of 3 km/hr covers a certain distance in 3 hours 40 minutes. If he covers the same distance by cycle in 11 hours, then what is the speed (in km/hr) of cycle?

 A) 1 B) 2 C) 4 D) 3

Explanation:

0 137
Q:

A aid can cycle at 16 km/h and walk at 7 km/h. To cover a distance of 109 km. she takes 8.5 hours. How much distance did she cover on foot?

 A) 17.5 km B) 24.5 km C) 21 km D) 28 km

Explanation:

0 306
Q:

Mark had to travel 220 km in 4.5 hours, using a train that travels at the speed of 60 km/h or a bus that travels at the speed of 40 km/h, or any combination of the two modes of transport. For how long did he travel by bus?

 A) 1 hour B) 1 hour 30 minutes C) 2 hours 30 minutes D) 2 hours

Explanation:

0 158
Q:

Rain swims in an 80 in long pool. He covers 160 m in one minute by swimming from one end to the other and back, along the same straight path. Find his average speed.

 A) 2.07 ms-1 B) 2.60 ms-1 C) 3.67 ms-1 D) 2.67 ms-1