Question

A is 1(4/5) times as fast as B. If A gives a start of 80 metres, how long should the racecourse be such that race ends in a dead heat?​

Answer 1

Answer:

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Step-by-step explanation:

=> Speed of A = 9/5 Speed of B.

=> When B covers 5 m, A covers 9 m

⇒ A can give a start of (9 – 5) = 4 m to B in a 9 m race.

⇒ 80 m (4 × 20) start in 9 × 20 = 180 m,

which should be the length of the racecourse.

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Answer 2

Speed of A = 9/5 Speed of B. When B covers 5 m, A covers 9 m ⇒ A can give a start of (9 – 5) = 4 m to B in a 9 m race. ⇒ 80 m (4 × 20) start in 9 × 20 = 180 m, which should be the length of the racecourse.