The area of a parallelogram whose adjacent sides are P→=2i^+3j^  and Q→=i^+4j^  is

P→×Q→=(2i^+3j^)×(i^+4j^)            =|i^j^k^230140|           =i^(0−0)+j^(0−0)+k^(8−3)=5k^  ∴   Area of parallelogram   =|P→×Q→|=5 square units