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Rate of A = 1/12 per day, Rate of B = 1/18 per day. In 4 days, A and B together complete: (1/12 + 1/18) × 4 = (3 + 2) / 36 × 4 = 20 / 36 = 5/9 of the work. Remaining work = 1 - 5/9 = 4/9. B's rate is 1/18 per day. B will take: (4/9) / (1/18) = 4/9 × 18 = 8 days. Correct answer: d. 8 days
A metal sphere of radius 7.35 cm is melted and cast into a cylinder of height 12 cm. Find the curved surface area of the cylinder...
If the speed of a boat in still water is 20 km per hour and the speed of current is 5 km per hour then the time taken by the boat to travel 150 KM with ...
A and B started a business with investments of Rs. _____ and Rs. 5000, respectively. Six months later, C joined with an investment of Rs. _____. After o...
The ratio of the number of boys to girls in a school is 7:5. If 10 more boys join the school and 10 girls leave, the new ratio of boys to girls becomes ...
The radius of a cylinder is 3 cm and its height is 10 cm. What is its total surface area?
What is the purpose of the "Slide Master" feature in Microsoft PowerPoint?
In a parallelogram, the base is 18 cm, and the height corresponding to the base is 10 cm. A perpendicular distance from the opposite vertex to the same ...
If 5m = 3125, then find the value of 4(m-3)
The speed of boat 'Y' in still water is the same as the downstream speed of boat 'X'. Boat 'X' requires 1 hour longer than boat '...
A shopkeeper mixes two varieties of tea, one costing ₹300 per kg and the other ₹450 per kg, in the ratio 5:3. He sells the mixture at ₹400 per kg....
