3.如圖,在矩形ABCD中,AB=8cm,AD=12cm,某一時(shí)刻,點(diǎn)P從點(diǎn)A出發(fā)沿邊AB向點(diǎn)B以2cm/s的速度運(yùn)動(dòng),同一時(shí)刻,點(diǎn)Q從點(diǎn)B出發(fā)沿邊BC向點(diǎn)C以2cm/s的速度運(yùn)動(dòng),當(dāng)點(diǎn)P運(yùn)動(dòng)到點(diǎn)B的位置時(shí),P、Q兩點(diǎn)同時(shí)停止運(yùn)動(dòng),問:
(1)經(jīng)過多長(zhǎng)時(shí)間,△DPQ的面積為38cm
2?
(2)△DPQ的面積能否為26cm
2?為什么?