A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
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avg. speed = 2v1×v2/v1+v2
= 2×21×24/21+24
=22.4km/h
dist =speed ×time
= 22.4×10
=224km
= 2×21×24/21+24
=22.4km/h
dist =speed ×time
= 22.4×10
=224km
Answered by
0
the total journey in km.is 224km
(1/2)x/21+(1/2)x/24= 10
x/21+x24= 20
(1/2)x/21+(1/2)x/24= 10
x/21+x24= 20
15x = 168 x 20
x =168 x 20/15 = 224 km.Similar questions