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2022-05-02 12:34:49
Chiều dài hình hộp chữ nhật đó là :
( 100 : 4 : 2 ) - 5 = 7,5 ( cm )
Diện tích toàn phần là:
( 7,5 x 5 x 2 ) + 100 = 175 ( cm2)
Đáp số : 175 cm2