Question

4. Mr. Amit can walk 8 km in 1 hour 20 minutes.
(a) How far does he go in :
(i) 10 minutes?
(ii) 30 seconds?
(b) How long will it take him to walk :
(i) 2500 m?
(ii) 6.5 km?​

Answer 1

Step-by-step explanation:

Amit walks 8 km in 1 hour 20 min

Or 1.1/3 = 4/3 hours

∴ Speed = Distance/Time

= 8/(4/3) = (8 × 3)/4 = 6 km/h

(a) (i) Distance covered in 10 minutes

= (6 × 1000 × 10)/ 60 = 1000 m = 1 km

(ii) Distance covered in 30 seconds

= (6 × 1000 × 30)/(60 × 60) = 50 m

(b) (i) Time taken in 2500 m = 2500/(1000 × 6)

= 5/12 hours = 5/12 × 60 = 25 minutes

(ii) Time taken in 6.5 km

= 6.5/6 = 65/60 hours

= 1 hours 5 minutes

Answer 2

Answer:

0.5km= 50m

Step-by-step explanation:

(6×1000×30)

__________. = 50m

60×60