Topics

General Knowledge
General Science
General English
Aptitude
General Computer Science
General Intellingence and Reasoning
Current Affairs
Exams
Elementary Mathematics
English Literature

In a 100m race, A runs at 5 m/sec. Even if B starts 8 m ahead of A. A wins by 3 sec., What is the speed of B?

A) 6 m/sec
B) 4 m/sec
C) 2 m/sec
D) 1 m/sec

Correct Answer:


B) 4 m/sec

Description for Correct answer:
A runs at 5 m/sec. Hence, she will take \( \Large \frac{100}{5} \) = 20 seconds to run 100m.

B starts 8 m ahead of A. Therefore, when A runs 100 m, B has to run (100 - 8) = 92 m.

Despite the lead B has. A finishes the race 3 seconds ahead of B.

Hence, B takes 20 + 3 = 23 seconds to cover the distance of 92 m.

Therefore, the speed of B = \( \Large \frac{92}{23} \) = 4 m/sec.

Part of solved Time and Distance questions and answers : >> Aptitude >> Time and Distance

Comments

Similar Questions

1). In a km race, even if B starts 20 seconds ahead, A wins by 40 m. However, if B starts 25 seconds ahead they finish together. What are their respective speeds in m/sec?

A). A-12 m/sec, B-10 m/sec

B). A-15 m/sec, B-13 m/sec

C). A-10 m/sec, B- 8 m/sec

D). A-16 m/sec, B-14 m/sec

2). A can run a 400m race in 40 seconds, while B takes 50 seconds to complete it. If B starts 100 m ahead in the race, by how many seconds will he win the race?

A). B, 4.5 seconds

B). B, 5.5 seconds

C). B, 6.5 seconds

D). B, 2.5 seconds

3). A and B start simultaneously from the same point along a circular track of length 1 km in the same direction at 4 m/sec and 5 m/sec respectively.
(i) When will they meet for the first time and at what point with respect to the starting
point in the direction of their sprint will they meet.
(ii) When will they meet for the first time at the starting-point?

A). (i) A has run 3 laps and B has run 4 laps (ii) 750 seconds

B). (i) A has run 4 laps and B has run 5 laps (ii)1000 seconds

C). (i) A has run 5 laps and B has run 6 laps (ii)1250 seconds

D). (i) A has run 5 laps and B has run 4 laps (ii)1500 seconds

4). A and B start on a circular track of length 400 m simultaneously from the same point in
opposite direction running at 5 m/sec and 3 m/sec respectively.
(i) When will they meet for the first time?
(ii) What point with respect to the starting point in the direction in which A runs will they meet?
(iii) When will they meet for the first time at the starting point?
(iv) How many times would they have met before they meet for the first time at the starting
point again?

A). (i) 60 seconds (ii) 350 m (iii) 450 seconds (iv) 6 times

B). (i) 40 seconds (ii) 200 m (iii) 350 seconds (iv) 8 times

C). (i) 50 seconds (ii) 250 m (iii) 400 seconds (iv) 7 times

D). (i) 80 seconds (ii) 300 m (iii) 500 seconds (iv) 5 times

5). A and B run around a circular track of radius 70 meters starting from the same point simultaneously and in the same direction. lf A runs at 25 m/min and B runs at 36 m/min, when will they meet for the first time?

A). 50 min

B). 55 min

C). 60 min

D). 40 min

6). Three people A, B and C run around a circular track of length 400 m starting simultaneously from the same point in the same direction at 5m/sec, 8 m/sec and 3 m/sec respectively.
(i) When will they meet for the first time and at what point will they meet?
(ii) When will they meet for the first time at the starting point?

A). (i) 400 seconds (ii) 400 seconds

B). (i) 450 seconds (ii) 500 seconds

C). (i) 500 seconds (ii) 550 seconds

D). (i) 300 seconds (ii) 400 seconds

7). In a kilometer race, A beats B by 10 seconds or 60 meters. How long does B take to run the course?

A). 166.67 Secs,

B). 233.33 Secs.

C). 333.67 Secs.

D). 266.67 Secs.

8). A runs \( \Large 2\frac{1}{4} \) times as fast as B. In a race between A and B, A wins by 75 meters. What is the length of the race?

A). 100 meters

B). 135 meters

C). 150 meters

D). 200 meters

9). A can run half a kilometer in1 min 30 seconds. B can run the same distance in 1 min 40 sec. In a kilometer race between A and B, by how many meters will A win the race?

A). 120 meters

B). 75 meters

C). 100 meters

D). 110 meters

10). P and Q run a kilometer and P wins by 30 seconds. P and R run a kilometer, and P wins by 250 meters. Q and R run a kilometer and Q wins by 30 seconds. Find the time taken by P, Q and R to run a kilometer.

A). P-155 sec., Q-185 sec, and R-215 sec.

B). P-160 sec., Q-190 sec, and R-220 sec.

C). P-190 sec., Q-220 sec, and R-250 sec.

D). P-180 sec., Q-210 sec, and R-240 sec.