Answers

2015-04-11T12:26:06+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1\ hour = 60\ minutes\\\\ 4.2\ km/min= 4.2 \times  \frac{km}{min} \times  \frac{60\ min}{1\ hour} =4.2 \times 60 \times  \frac{km}{hour} =\boxed{252\ km/h}
1 5 1
2015-04-11T12:30:00+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
4.2 km / min = 252 km / hr
for min to houre multiply it with 60 
because 60 min. = 1 houre
so 
4.2 * 60 = 252 km/ hr
1 4 1