In a 400 m race, A gives B a start of 5 seconds and beats him by 15 m. – McqOptions

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1.	In a 400 m race, A gives B a start of 5 seconds and beats him by 15 m. In another race of 400 m, A beats B by $$7\frac{1}{7}$$ seconds. Their respective speed are -
A.	m/sec, 7 m/sec
B.	m/sec, 7 m/sec
C.	m/sec, 7 m/sec
D.	m/sec, 7 m/sec
Answer» D. m/sec, 7 m/sec

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