Question

Sulekha is walking at a speed of 120 metres/ minute.What distance can she cover in 30 m

Answer 1

Distance = 30m

Speed = 120m/s

Since, speed = distance/time

So, time = distance/speed

= 30/120

= 3/12

= 1/4

= 0.25 seconds.

Answer 2

Sulekha can cover 360 m in 3 minutes.

Given,

Speed of Sulekha=120 m/min

Time=30 min

$120 \frac{m}{min}=\frac{120}{60} \frac{m}{s}$                  $(1 min=60 seconds)$

$120 \frac{m}{min}=2 \frac{m}{s}$.

To find,

distance covered in 30 minutes.

Solution:

The speed is equal to the ratio of distance covered and time taken.

$(1 min=60 seconds)$

$Speed=\frac{Distance}{Time}\\\\Distance=SpeedXTime\\ Distance=2X3X60 m\\Distance=360 m.$          

The distance that can be covered in 30 minutes is 360 m.

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