Question

Lily swims a 100 meter race.She swims the first half in 27.8 seconds.She swims the second in 30.12 seconds.About how lkong does it take lily to win the whole race?Choose the best estimate.

Answer 1

58 seconds

Explanation:

100 meters in all

Exact calculations:

There are 2 half parts and first half in 27.8 seconds and second in 30.12 seconds so in all it took 27.8+30.12 = 57.92 seconds

Best estimates

27.8 ≈ 28

30.12 ≈ 30

Lily swims a 100 meter race in about 28+30 = 58 seconds