3 persons can paint a house in 8 days

3 persons can paint a house in 8 days, then 4 persons can paint the same house in
(a) 5 days
(b) 6 days
(c) 7 days
(d) none of these

Solution:

A photograph of bacteria is enlarged 100000 times attains a length of 5 cm, then actual length of the bacteria is
(a) 0.00005 cm
(b) 5 × 10^-5
(c) 5 × 10^-7
(d) all of these

Solution:

A tree 12 metre high casts a shadow of length 8 metre. Height of the tree whose shadow is 6 metre in length is
(a) 6 m
(b) 9 m
(c) 15 m
(d) none of these

Solution:

More Solutions:

• A farmer can reap a field in 10 days while his wife can do it in 8 days
• One tap fills a tank in 20 mins and another tap fills it in 12 mins
• A can do a piece of work in 40 days
• If 3 women or 5 girls take 17 days to complete a piece of work
• A, B and C can separately do a work in 2, 6 and 3 days