Question

3. Amit, Aman and Neeraj ran a 100 m race. Amit covered the track in 19,5 s, Aman in
18.9 s and Neeraj in 20.5 s. Who won the race? Who got the third position?
4. An ant walked up a distance of 12 m in 15 s. What was the speed of the ant?
9. A police dog runs after the odour of a thief at a speed of 5 m/s. How long would it take to reach the
thief, if he is hiding at a place 62 m from the crime scene?
A car travelled a distance of 200 kilometres between Delhi and Agra in 2.5 hours. Calculate the
average speed of the car during the journey.
please friends solve these questions step - by- step because tomorrow is my exam ​

Answer 1

Answer:

Explanation:

3.

amit - 19.5 sec

aman - 18.9 sec

neeraj - 20.5 sec

arranging in ascending order, from least to maximum time periods,

aman - 18.9 sec (won the race)

amit - 19.5 sec

neeraj - 20.5sec( third position)

4.

distance walked by ant, d = 12m

time taken = 15 sec

speed = distance/time

  = 12/15 = 0.8 m/sec.

9.

speed = 5 m/s

distance, d = 62m

time, t = distance/speed

  t = 62/5 = 12.4 seconds.

.......

distance covered, d = 200 km

time taken = 2.5 hrs

average speed = distance / time = 200/2.5

  = 80 km/hr  = 80*(5/18)  =  22.22 m/sec.

(5/18 is the conversion ratio from km/hr to m/sec)

Answer 2

Answer:

5. Time = Distance

________

Speed

= 62

_____

5

=12.4 seconds