a trader allows 4% trade discount and makes a profit of 100/3 % on cost price. The price goes up by 25% and he required to increase the trade discount to 10% by what percent the catalogue price has to be increased, so that the trader may make the rate of profit on cost price​

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours