A solution of a salt of a metal was electrolysed for 150 minutes with a current of 0.15 amperes. The weight of metal deposited was 0.783 g. The equivalent weight of the metal is

Time (t) = 150 min = 9000 sec

Current (I) = 0.15 A

Weight of metal (w) = 0.783 g

We know $Q=I\times t=0.15\times 9000=1350C$. 1350 C of electricity will deposit 0.783 g of metal, so 96500 C of electricity will deposit $\frac{0.783\times 96500}{1350}=55.97g$