Question

15. 15. Maria cycling at a speed of 18km per hour covers along the perimeter of an equilateral
triangular field in 10minutes. Let us write by calculating the time required for Maria to go
directly to the mid point of the side of the field starting from its opposite vertex. (/3=1.732)​
it
GiVe

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SHOULD

NOT BE WRONG

OTHERWISE IT WILL BE REPORTED​

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Answer 1

Step-by-step explanation:

Given, the field is equilateral triangle

Let the side of triangle be x cm then each side of triangle = x km

She travels at speed of 18km/hour

⇒ She travels at the speed of 3 km in 10 minutes (

⇒

⇒ Distance she covers in 10 minutes = 3 × 10 = 30 km

Now according to the given condition

3x = 30

⇒ x = 10

Now each side of equilateral triangle = 10km

Midpoint of the side of the field directly from the opposite vertex means the perpendicular distance to that side which is also the height of the triangle

Area of triangle = 1/2 × base × height

⇒

⇒

⇒ h =

km

=

= 0.3464 km

Time taken to cover this distance

Time

= 0.0192 hour