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Ban giai giup minh bai nay voi nhe ☢☣

Home/ Môn Học/Môn Toán/Ban giai giup minh bai nay voi nhe ☢☣

Ban giai giup minh bai nay voi nhe ☢☣

Question

Ban giai giup minh bai nay voi nhe ☢☣
ban-giai-giup-minh-bai-nay-voi-nhe

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Môn Toán Neala 9 months 2021-04-23T16:37:45+00:00 2021-04-23T16:37:45+00:00 2 Answers 9 views 0

Answers ( )

diemthu
0
2021-04-23T16:39:05+00:00 April 23, 2021 at 4:39 pm

Reply
Đáp án:

Ta có:10m/s=36km/h

S₁+S₂=120

$\Leftrightarrow v_{1} t_{1} + v_{2} t_{2} = 120$ $\Leftrightarrow 54 t_{1} + 36 t_{2} = 120$

mà t₁=t₂=t

$\Leftrightarrow 54 t + 36 t = 120$ $\Leftrightarrow 90 t = 120 \Rightarrow t = \frac{4}{3} h = 80^{'}$

Giải thích các bước giải:
niczorrrr
0
2021-04-23T16:39:37+00:00 April 23, 2021 at 4:39 pm

Reply
Đáp án:

Ta có:10m/s=36km/h

S₁+S₂=120

$\Leftrightarrow v_{1} t_{1} + v_{2} t_{2} = 120$

$\Leftrightarrow 54 t_{1} + 36 t_{2} = 120$

mà t₁=t₂=t

$\Leftrightarrow 54 t + 36 t = 120$

$\Leftrightarrow 90 t = 120 \Rightarrow t = \frac{4}{3} h = 80^{'}$

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