Question

Malaika takes 20 minutes to cover a distance of 3.2 km on a bicycle. Calculate her speed in units of km/ min, m/ min, km/hr and m/s.

Answer 1

Answer:

In Km / min -        0.16 km/min

in m /min    -         160 m / min

in Km /hr     -         9.6 km /hr

in m/s         -           2.667 m/s

Explanation:

We have here             Distance =  3.2 km      = 3.2 x 1000 m = 3200 m

                                    Time = 20 minute = 20 x 60 sec = 1200 sec

                     and as we know 60 minute = 1 hr

                         so                      20 minute = (1/60) x 20 hr = 1/3 hr

now we have formula for speed as        SPEED = DISTANCE/TIME

                       in KM/MIN                 = 3.2 / 20 = 0.16 Km / min

                       in M / min                   = 3200 / 20 =   160 km/min

                       in Km / hr                   = 3.2 / (1/3) = (3.2 x 3)/1 = 9.6 Km/hr

                       in M / sec                    = 3200 / 1200            = 2.667 m/sec

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