Physics, asked by mansi5556, 1 year ago

A girl grow to hospital from her home. The odometer reading of a car increased by 12.0 km. If she returned home by the same path in 2 hours 12 minutes. What was her average speed of the entire travel .

Answers

Answered by TPS

When the girl went to hospital from home, odometer reading of a car increased by 12.0 km.

So distance between home and hospital = 12km

when she goes to hospital and returns, total distance covered = 12 + 12 = 24km

total time = 2h 12min

12 min = 12/60 h = 1/5 h

so total time = (2 + 1/5) h = 11/5 h

average speed = distance/time = 24/(11/5) = 24 × 5/11 = 120/11 km/h = 10.91 km/h

Average speed = 10.91 km/h

TPS: @sprao534 do you think otherwise?

sprao534: i think only return time

TPS: i too thought so in the beginning.

TPS: but the wording seems to indicate total time. and 5kmph is really really slow

TPS: @mansi Do you have an answer?

sprao534: she is going to hospital.it depends on condition of the patient.

ashwin9985: Hi

mansi5556: Well I don't have but I think this answer is correct

Mandeep526243: hy, mansi

Answered by Anonymous

Girl went to hospital from home

odometer reading increased by 12km
that means distance from home to hospital is 12 km

Now she returned home by same path in 2 hr 12 minutes

As path is same so distance from hospital to home is same 12 km

and time taken = 2 hour 12 minutes

= 2 + 12/60 = 2 + 1/5 = 2.2 hr

So average speed = total distance/total time

= 24/2.2 = 10.9 km/hr

mansi5556: thanks

mansi5556: please stop useless messaging

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