27
Q:

# A man traveled from the village to the post-office at the rate of 25 kmph and walked back at the rate of 4 kmph. If the whole journey took 5 hours 48 minutes, find the distance of the post-office from the village ?

 A) 40 km B) 30 km C) 20 km D) 10 km

Explanation:

Average speed = $2aba+b$, here a=25 b=4
= 2 x 25 x 4/(25+4) = 200/29 km/hr.

Distance covered in 5 hours 48 minutes
= Speed x time = (200/29)x (29/5) Distance covered in 5 hours 48 minutes = 40kms.

Distance of the post office from the village = (40/2) = 20 km.

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 72
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:

0 209
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:

0 120
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

Explanation:

0 140
Q:

A car runs at a speed of 65 kmph to reach its destination in 45 minutes. What should be its speed for it to reach the destination in 36 minutes?

 A) 52 B) 81.25 C) 65 D) 74

Explanation:

0 110
Q:

A man travelled at 40 kmph. Had he increased his speed by 16 kmph, he would have covered 870 km more in the same time. Find the actual distance travelled?

 A) 40 km B) 20 km C) 30 km D) 48 km

Explanation:

2 177
Q:

Ritesh drove at a speed of 60 km/h for 8 hours. For how many hours should he now drive at a speed of 80 km/h for the overall average speed to become 72 km/h?

 A) 8 B) 12 C) 10 D)  15

Explanation:

0 167
Q:

The speed of car B is half the speed of car A. If car A covers a distance of 120 km in 1.5 hrs, what is the speed of car B?

 A) 40 kmph B) 60 kmph C) 30 kmph D) 50 kmph