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3 years ago

800 m 35 cm - 154 m 49 cm

Mathematics

1 answer:

Reptile [31]3 years ago

5 0

Answer:

645 m 86 cm

Step-by-step explanation:

Since 49 cm is greater than 35 cm, we must borrow 100 cm from 800 m, obtaining 799 m 135 cm. Subtracting 154 m 49 cm from that, we get:

645 m 86 cm

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3 years ago

Crawling Crayfish!

boyakko [2]

Answer: Crayfish, 25 s

Step-by-step explanation:

Given

The length of race is 60 cm

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Cray fish covers 6 cm in 5 s i.e. its speed is

$\Rightarrow \dfrac{6}{5}=1.2\ cm/s$

Flicker covers 4 cm in 5 s, its speed is

$\Rightarrow \dfrac{4}{5}=0.8\ cm/s$

Time taken by Cray fish to cover the race is

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$\Rightarrow t_2=\dfrac{60-10}{0.8}\\\\\Rightarrow t_2=62.5\ s$

Time taken by crayfish is less. Hence, crayfish wins the race

When they both covers the same distance, they tied momentarily i.e.

$\Rightarrow 1.2t=10+0.8t\\\Rightarrow 0.4t=10\\\\\Rightarrow t=\dfrac{10}{0.4}\\\\\Rightarrow t=25\ s$

After 25 s, they tied the race.

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3 years ago

Find the student’s error in solving the following inequality.

Volgvan

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Step-by-step explanation:

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