Lilac lavender A2010-01-27 19:01:14 +0000 #1
a swimming pool 50 meters long and 25 meters wide, depth 2 meters. In the pool's sides and bottom affixed above the square decimeter of length two tiles, a total number of blocks?
The pool covers an area of many square meters?
Xiao-Hua walk along the swimming pool surrounded by two laps, a total number of meters away?
black Small Assassin2010-01-27 19:14:17 +0000 #2
If you mean inside the wall, surrounded by the words
so 50 * 2 * 2 +25 * 2 * 2 +25 * 50 = 1550
1550/0.2 = 7750 (blocks)
A: A total of be 7750
50 * 25 = 1250 (m)
A: an area of 1250 square meters
(25 * 2 +50 * 2) * 2 = 300 (m)
A: A total of 300 meters to go
answered very carefully selected me
broken songのXiang2010-01-27 19:43:26 +0000 #3
① 50/0.2 = 250 Kuai
25/0.2 = 2/0.2 = 125
10
total of (250 * 125 * 10) block
② 50 * 25 = 1250 Pingfang Mi
③ (50 +25) * 2 * 2 = 75 * 2 * 2 = 150 * 2 = 300 Mi
hrwxfjd2010-01-27 19:41:14 +0000 #4
a total number of blocks:
unit not the same as a unified unit of the first two decimeter = 0.2 meters to the first count a brick an area of 0.2 X 0.2 = 0.04 Pingfang Mi
50 × 25 ÷ 0.04 +50 × 2 × 2 ÷ 0.04 +25 × 2 × 2 ÷ 0.04 = 31250 +5000 +2500 = 38750 (block)
It covers an area:
that is, ask him to the bottom area of ah!
Length X width 50 × 25 = 1250 (square meters)
total number of meters to go:
also is the desire of its perimeter ah!
(50 +25) × 2 × 2 = 300 (m)
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