5. Amrita came first in x races and second in y races. A score of 5 points is given for coming first and3 points for the second place in a race. She scored 34 points but if the number of games in whichshe came first and second were interchanged she would have scored 4 points less. Find x and y.
Answers
Answered by
1
Answer:
. A is
2
1
3
times as fast as B. If A gives B a start of
80
metres, how long should the race course be so that both of them reach at the same time?
A.
170
metres B.
140
metres
C.
160
metres D.
150
metres
Answered by
15
Step-by-step explanation:
speed of A : speed of B =7
3:1=7:3
73:1=7:3
It means, in a race of 7
7 metres, A gains
(7−3)=4
(7−3)=4 metres.
If A needs to gain 80
80 metres, race should be of
74×80 = 140
=140 metres
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