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please solve this please​

Answer 1

Answer:

62. The area of a rectangular field is 48m

2

and one of its sides is 6m. How long will a lady take to cross the field diagonally at the rate of 20 m/minute

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ANSWER

Given, the area of a rectangular field is 48m

2

and one side of the rectangle is = 6m.

Therefore, area of a rectangle = length×breadth

⇒ 48 = 6×breadth

⇒ Breadth = 8 m

In triangle ACD, ∠D=90

∘

Use pythagoras theorem

⇒ (AC)

2

=(AD)

2

+(DC)

2

⇒ (AC)

2

=(6)

2

+(8)

2

⇒ (AC)

2

= 36+64

⇒ (AC)= \sqrt{100} $$ = 10 m

Time taken at the rate of 20 m/ min = distance/ speed

= 10/20 =

2

1

min or 30 sec