JEE Mains 29-Jan-2023 Shift 2 Solved Paper

When two resistance R1 and R2 connected in series and introduced into the left gap of a meter bridge and a resistance of 10Ω is introduced into the right gap, a null point is found at 60‌cm from left side. When R1 and R2 are connected in parallel and introduced into the left gap, a resistance of 3Ω is introduced into the right-gap to get null point at 40 cm from left end. The product of R1R2 is _______ Ω2