標題:
幫忙下數學題列式
幫忙以下數學題列式23) A spuare vegetable fild has an area of 441 m2 . It is surrounded by a fence. Find the length of the fence.24) The side of a square field is 50 m. It is planted fwith flowers, leaving a margin of 1 m wide all round. Find the area of the margin.25) After coveing 15% of the journey in the morning and... 顯示更多 幫忙以下數學題列式 23) A spuare vegetable fild has an area of 441 m2 . It is surrounded by a fence. Find the length of the fence. 24) The side of a square field is 50 m. It is planted fwith flowers, leaving a margin of 1 m wide all round. Find the area of the margin. 25) After coveing 15% of the journey in the morning and 33% of it in the afternoon, Amy found that she still had 260km left. Find the total distance of the journey.
最佳解答:
23) The length of the fence = 4 x √441 = 84 m 24) The area of the margin = (50 + 1)2 - 502 = 101 m2 25) % of journey she hasn't finished = 1 - 15% - 33% = 52% The total distance of the journey = 260 / 52% = 500 km
其他解答:
23) A square vegetable field has an area of 441 m2 . It is surrounded by a fence. Find the length of the fence. Let a meters be the length of the fence. Given area of field = 441 m^2 Thus, length of one side of the fence = √ 441 =21 Therefore , length of fence, a =21 * 4 = 84 (meters) 數學題列式: a = √ 441 * 4 = 84 (meters) 24) The side of a square field is 50 m. It is planted with flowers, leaving a margin of 1 m wide all round. Find the area of the margin. Let a meters be the length of the margin; Thus the area of the margin = a^2 sq. meters Given the length of one side of a square field = 50 m. Thus, the area of field (without flower margin) = 50 ^2 sq. m. Also, the length of one side of field (with margin) = 50 + 2 m. Thus, the area of field (with flower margin) = (50 + 2) ^ 2 sq. m. Area of margin, a = (50 + 2) ^ 2 - 50 ^2 = 204 (sq. m.) 數學題列式: a = (50 + 2) ^ 2 - 50 ^2 = 204 (sq. m.) 25) After coveing 15% of the journey in the morning and 33% of it in the afternoon, Amy found that she still had 260km left. Find the total distance of the journey. Let a km. be the total distance of the journey. a - 15%a - 33%a = 260 52% a = 260 a = 500 (km.) 數學題列式: a = 260 * 100 / (100 - 15 - 33) = 500 (km.) 希望幫到你.
幫忙下數學題列式
此文章來自奇摩知識+如有不便請留言告知
發問:幫忙以下數學題列式23) A spuare vegetable fild has an area of 441 m2 . It is surrounded by a fence. Find the length of the fence.24) The side of a square field is 50 m. It is planted fwith flowers, leaving a margin of 1 m wide all round. Find the area of the margin.25) After coveing 15% of the journey in the morning and... 顯示更多 幫忙以下數學題列式 23) A spuare vegetable fild has an area of 441 m2 . It is surrounded by a fence. Find the length of the fence. 24) The side of a square field is 50 m. It is planted fwith flowers, leaving a margin of 1 m wide all round. Find the area of the margin. 25) After coveing 15% of the journey in the morning and 33% of it in the afternoon, Amy found that she still had 260km left. Find the total distance of the journey.
最佳解答:
23) The length of the fence = 4 x √441 = 84 m 24) The area of the margin = (50 + 1)2 - 502 = 101 m2 25) % of journey she hasn't finished = 1 - 15% - 33% = 52% The total distance of the journey = 260 / 52% = 500 km
其他解答:
23) A square vegetable field has an area of 441 m2 . It is surrounded by a fence. Find the length of the fence. Let a meters be the length of the fence. Given area of field = 441 m^2 Thus, length of one side of the fence = √ 441 =21 Therefore , length of fence, a =21 * 4 = 84 (meters) 數學題列式: a = √ 441 * 4 = 84 (meters) 24) The side of a square field is 50 m. It is planted with flowers, leaving a margin of 1 m wide all round. Find the area of the margin. Let a meters be the length of the margin; Thus the area of the margin = a^2 sq. meters Given the length of one side of a square field = 50 m. Thus, the area of field (without flower margin) = 50 ^2 sq. m. Also, the length of one side of field (with margin) = 50 + 2 m. Thus, the area of field (with flower margin) = (50 + 2) ^ 2 sq. m. Area of margin, a = (50 + 2) ^ 2 - 50 ^2 = 204 (sq. m.) 數學題列式: a = (50 + 2) ^ 2 - 50 ^2 = 204 (sq. m.) 25) After coveing 15% of the journey in the morning and 33% of it in the afternoon, Amy found that she still had 260km left. Find the total distance of the journey. Let a km. be the total distance of the journey. a - 15%a - 33%a = 260 52% a = 260 a = 500 (km.) 數學題列式: a = 260 * 100 / (100 - 15 - 33) = 500 (km.) 希望幫到你.
文章標籤
全站熱搜
留言列表
