Two mobile phones were purchased at the same price. One was sold at a profit of 20% and second was sold at a price which was INR 1520/- less than the price at which the first was sold. If the overall profit earned by selling both the mobile phones was 1%, what was the cost price of one mobile phone

A jar has 40 litre milk. From the jar, 8 litre of milk was taken out and replaced by an equal quantity of water. If 8 litre of the newly formed mixture is taken out of the jar. What is the final quantity of milk left in the jar

I. 6x²+11x+3=0

II 20y²+9y+1=0

I. 30x²+17x+2=0

II 3y²+8y+4=0

I. 4x²-13x+10=0

II 2y²-15y+22=0

I. x²-10x+25=0

II y²-9y+20=0