Question

A woman walks a certain distance in 84 min. She covers two thirds of it at 4 km/h and the
rest at 5 km/h. Find the total distance she covered.​

Answer 1

Answer:

6km

Step-by-step explanation:

Let total distance covered be D

Total time taken= 84min= 7/5 hrs

Time taken= distance./ speed

2D/3(4) +D/ 3(5) =7/5

(10D+4D)5= 21(20)

70D= 420

D= 420/70

D= 6

Therefore total distance covered = 6km

Answer 2

Answer:

Let xbe the distance

Step-by-step explanation:

2x/12+x/I5=84/60

multiplying by 60

l0x+4x = 84

14x=84

x = 6 km