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Sushila is walking with a constant speed of 4.2km/h.How much distance will she cover in 40 minutes?

Posted by Pranav Prabhakar 5 years, 5 months ago

CBSE > Class 07 > Mathematics

2 answers

Jaithra Paul 5 years, 5 months ago

Given , speed s = 4.2km/h or 7/6m/s and time period t = 40min or 2400sec we know that s=d/t d=sXt d=7/6X2400 d=2800

0Thank You

Gaurav Seth 5 years, 5 months ago

2.8 km

Explanation:

The speed is the change of distance with time

v = d/t

The speed in m/s will be

v = (4.2 km/h) * = 1.16 m/s.

Solve for d, we get the distance by

d = v.t = (1.16 m/s) (40* 60 s) = 2800 m = 2.8 km

2Thank You

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CBSE > Class 07 > Mathematics