A train is moving with a uniform velocity of (2hat(i)-hat(j)+4hat(j))ms^(-1). If the force required to overcome friction is (hat(i)-3hat(j)+2hat(k))N, the power of the engine is

A train is moving with a uniform velocity of (2hat(i)-hat(j)+4hat(j))m

1.	A train is moving with a uniform velocity of (2hat(i)-hat(j)+4hat(j))ms^(-1). If the force required to overcome friction is (hat(i)-3hat(j)+2hat(k))N, the power of the engine is
Answer» 7W 10 W 13 W 15 W Answer :C