6
Q:

In a race of 200 m, A can beat B by 31 m and C by 18 m. In a race of 350 m, C will beat B by ?

A) 25 m B) 21 m
C) 22 m D) 19 m

Answer:   A) 25 m



Explanation:

A:B = 200 : 169
A:C = 200 : 182
 CB = CA×AB 

 

182200×200169

 

=> 182:169

 

When C covers 182 m , B Covers 169 m
When C covers 350 m , B Covers 169182×350
=> 325 m

 

 

 

So C beats B by (350 - 325) = 25 m.

Q:

Which of the following pairs are co-primes?

 

 

A) 59, 97 B) 348, 296
C) 3025, 4920 D) 114, 213
 
Answer & Explanation Answer: A) 59, 97

Explanation:
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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
 
Answer & Explanation Answer: C) 48 km/hr

Explanation:
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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
 
Answer & Explanation Answer: A) 275 km

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0 162
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
 
Answer & Explanation Answer: B) 120/7

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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
 
Answer & Explanation Answer: A) 1

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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
 
Answer & Explanation Answer: C) 21 km

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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
 
Answer & Explanation Answer: C) 2 hours 30 minutes

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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
 
Answer & Explanation Answer: D) 2.67 ms-1

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0 167