Start learning 50% faster. Sign in now
Initial Men = 15. These 15 men can finish the work in 280 days. Total Work = 15 * 280 men-days days = 4200 men- days They work for 10 days. So, work done = 15*10 men-days. Now 15 more men were added, and they worked for 10 days= 30*10 men days Similarly for the next days 15*10+ 30*10+………….+ nth term = 15*280 10(15 + 30 + ..............nth term) = 15*280 So, this makes an AP. Sum= (n/2) *{2a + (n-1)d} Where n is the nth term, a= first element, d is the difference 15* 280= 10[(n/2) *{2*15 +(n-1)15}] 15*28 = (n/2)*(15+ 15n) 30*28 15n+ 15n2 n²+n = 56 So, n = 7, -8 (but n cannot be negative) So, n=7 It means 7*10 = 70 days So, work will be done in 70 days.
Three statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with ...
Statements : All doors are chairs.
Some chairs are glass.
Some glasses are not tables.
Conclusions : I. No glass is a...
Statements: Some guitars are harmoniums.
No harmonium is a sitar.
Conclusions: I. Some guitars are not sitars.
II. Some sitars ar...
Statements:
Some dogs are cats.
No camel is a rat.
All cats are camels.
Conclusions:
I. All dogs may be camels....
Statements : No triangle is a square.
Some squares are rectangles.
All rectangles are circles.
Conclusions : I. Some circles are ...
Statement:
Some lehenga are saree.
Only a few suit are dhoti.
Only a few dhoti are hanky.
All lehenga are hanky....
Statements: All phones are battery.
No battery is a network.
...
Statements: All Meggi are momos.
All chowmin are momos.
...
Statement:
Only Cricket is Kabbadi
No Kabbadi is Volleyball
Only a few Football are Vollybal...