shravanmm Classes are held on alternate days , and each class is 30-40 minutes in duration. Fine. I prefer it with the comma, though.
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shravanmmClasses are held on alternate days, and each class is 30-40 minutes in duration.Fine. I prefer it with the comma, though.
CalifJimClasses are held on alternate days, and each class is 30-40 minutes in (of) duration.Thank you.
shravanmmHow about usage of OF here instead of in.No. Goodness! You've already had my confirmation that your sentence was right. Why start changing words to make it wrong?