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2 years ago

8

During physical activity of high intensity, your heart will beat at a percentage of its maximum rate. Which range shows the corr

ect percentages
during this type of activity?
A. 40%-50%
B. 50%-70%
C. 70%-85%
D. 85%-100%

1 answer:

nevsk [136]2 years ago

6 0

Answer:

C. 70 to 85

Explanation:

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$\textsf {\large{\underline { \underline {SOLUTION:-}}}}$

⇰Let O be the point of observation on the ground OX.

⇰Let A and B be the two positions of the jet.

$\bf➠Then, \angle XOA=60⁰ \: and \: \angle \: XOB=30⁰ \\ \\$

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$\bf \:➥ Hence \: ,the \: required \: height \: is \: \boxed{ \boxed{ \bf2598 \: m.}} \\ \\$

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