A man goes from his home to the grocery
shop at a speed of 6 km/h and returns at
a speed of 9 km/h. If the distance from his home to shop is 900m,calculate the total time (in minutes) and (in hours if you can)that he spends travelling his home to the shop and back.
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Step-by-step explanation:
Answer :-
→ Total time [in minutes] = 15 minutes
→ Total time [in hours] = 0.25 hour
Explanation :-
We have :-
• Speed during first journey = 6 km/h
• Speed during return journey = 9 km/h
• Distance = 900 m = 0.9 km
________________________________
For first journey :-
⇒ Time = Distance/Speed
⇒ t₁ = 0.9/6
⇒ t₁ = 0.15 h
For return journey :-
⇒ Time = Distance/Speed
⇒ t₂ = 0.9/9
⇒ t₂ = 0.1 h
________________________________
Total time taken (in hours) :-
= t₁ + t₂
= (0.15 + 0.1) h
= 0.25 h
Total time taken (in minutes) :-
⇒ 1 hour = 60 mins
⇒ 0.25 hour = 0.25 × 60
⇒ 15 mins