1.

Awallof100metrescanbe builtby 7 men or 10 women in 10 days.How many days will 14 men and20 women take to build a wall o600 metres?(1) 15(3) 25(2) 20(4) 30

Answer»

let no of days taken be xwall built by 10 women in 10 days=100mwall built by 1 woman in 1 day= 100/(100)=1mwall built by 20 women in 1 day= 20mwall built by 7 men in 10 days= 100mwall Built by 1 man in 1 day= 100/70 mwall built by 14 men in 1 day= 20mso, 20x+ 20x=600or, 40x=600or, x=600/40=15 days


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