For 15 people--each has to pay Rs.20.For 20 people--each
has to pay Rs.18. For 40 people--how much has each to pay ?
Answer Posted / mathumetha
15*20=300
20*18=360(increased by 60)
for 40 = 360+60=420
420/40=10.5
for 40 each person has to pay 10.5
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