Different between 1) if they had informed us earlier , we could have reached there 2)if they had informed us earlier, we would have reached there.

1. If they had informed us eariler, we could have reached there. Agar ve hume pehale btate toh hum vaha pahunch sakte the. 2. If they had informed us eariler, we would have reached there. Agar ve hume pehale btate toh hum waha pahunch jate. Only translation different of sentence.

Sorry , I don't know Hindi to make u better understand it but what i can say is..first sentence says they have the ability to go there but they couldn't go there. second sentence says they have willing to go there but they didn't go there.

Hey. .... The meaning of first sentence is. .........agar tumne hume pehle bataya hota, to hum waha pahunch sakte .The meaning of second sentence. ........agar tumne hume pehle bataya hota, to hum waha pahunch chuke hote.