Question

A person can cover half of the distancein 15 seconds with 20m/ second if he covers remaining half distance with 15 meter per second in what time he covers​

Answer 1

Answer:

TIME = 40 SEC

Explanation:

Let the distance be x metres.

Then,

DISTANCE = SPEED * TIME

1/2 of x = 20*15

x/2 = 300

x = 300 * 2

x = 600

Now if half the distance is 600 metres Then,

TOTAL DISTANCE = 1200 METRES

NOW,

According to the question,

if half the distance is now travelled at a speed of 15 m/sec

then , T =

t = d/s

t = 600/15

t = 40

This is the time for second case.

if u want to know the total time u can add

Time of first case with the time of second case

to know the total time taken...

now , total time = 40 + 15

                            = 55 sec