Question

The distance covered by a car moving with a speed of 36 km/h in 15m is (a) 0.9 km (b) 9.0 km (C) 90 km (d) 900 km​

Answer 1

Given :

Speed of a car = 36 km/h

Time taken = 15 minutes

Converting the time into hour:-

= 15/60 hours

= 1/4 hours

As we know that,

• Distance = Speed × Time

= (36 × 1/4) kilometres

= 9 kilometres

Hence the distance covered is 9 kilometres.

Option b) 9.0 km

Answer 2

This is a uniform rectilinear motion exercise.

To start solving this exercise, we obtain the following data:

Data:

• v = 36 km/h
• d = ¿?
• t = 15 min = 0.25 hr

Minutes to hour converter

60 min = 1 hour

`\boldsymbol{\sf15\\ot{min}*\frac{1 \ hr}{60 \\ot{min}}=0.25 \ hr }}`

To calculate distance, speed is multiplied by time.

We apply the following formula: d = v * t

We substitute our data into the formula:

`\boldsymbol{\sf{d=v*t}}`

`\boldsymbol{\sf{d=36 \frac{km}{\\ot{h}}*0.25 \\ot{h} }}`

`\boldsymbol{\sf{d=9 \ km}}`

The distance traveled by a car moving with a speed of 36 km/h in 15 m is 9 km.

• Therefore, the correct option is "B".