Sony bought 80 pens at rs 12 each and sold 15 pens for rs 242 at what price must remaining pens be sold to gain 20% on whole transaction

72 pens

Step-by-step explanation:

80*12 = 960

960*1.2 = 1152

242/15 = 16.1333333333

1152/16.1333333333 = 71.4049586778

71.4049586778 rounds up to 72 pens.

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.

dont know

step-by-step explanation: