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A and B are travelling towards each othe...

A and B are travelling towards each other from the points P and Q respectively. After crossing each other A and B take `6 1/8` hours and 8 hours, respectively, to reach their destinations Q and P, respectively. If the speed of B is 16.8 km/h then the speed ( in km/h) of A is:
A और B क्रमशः बिंदु P और Qसे एक-दूसरे की तरफ आ हहे हैं | एक-दूसरे को पार करने के बाद, A और B को अपने-अपने गंततव्यों अर्थात Q और P तक पहुँचने में क्रमशः `6 1/8` घंटे और 8 घंटे लगते हैं | यदि B की चाल 16.8 किमी/घंटा है, तो A की चाल ( किमी/घंटा में ) ज्ञात करें |

A

20.8

B

19.8

C

19.2

D

20.4

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