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= 12cm
PQ= 15cm
QL= 120/15
= 8cm
Volume= p x l x t
12 x 15 x 8
= 1440
pqrs = 180 >> pq.qr = 180 >> 15.qr = 180 >> qr = 12 (l)
pqlk = 120 >> pq.ql = 120 >> 15.ql = 120 >> ql = 8 (t)
v= plt
= 15. 12. 8
= 1440 cm³