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Let the total work = 200 units Then, efficiency of ‘A’ = (200/50) = 4 units/hour Work completed by ‘A’ alone in 20 hours = 4 × 20 = 80 units Remaining work = 200 – 80 = 120 units So, efficiency of ‘B’ = 120/10 = 12 units/hour Therefore, combined efficiency of ‘A’ and ‘B’ = 12 + 4 = 16 units/hour So, time taken by ‘A’ and ‘B’ together to complete the work = (200/16) = 12.5 hours
The diameter of the base of a right circular cone is 4.2 cm and its height is 10 cm. calculate the volume of the cone.
If A:B = 5:8 and C:B = 4:9 then find the value of (A:B:C) .
Sanjay earns Rs. 40,000 per month. He spends 20% of his income on conveyance. From the remaining amount, he allocates 25% for groceries. How much does h...
Find the value of ‘x’ if x% of 600 + {1440 ÷ x of 16} × 8 = 156
The respective ages of a mother and her daughter are 45 and 9 years. In how many years will the mother be thrice as old as her daughter?
A shopkeeper sets the selling price of an item higher than its cost price. After offering a 4% discount, the shopkeeper earns a 20% profit. What percent...
The average of 13 natural numbers is 45. If the average of first 7 numbers is 35 and the average of last seven numbers is 55, then find the value of num...
Find two numbers whose highest common factor (HCF) is 24 and least common multiple (LCM) is 144, and determine their product.
A clock has a cost price of Rs. 1,800. It is marked at a price that is 50% higher than the cost price and then sold after two consecutive discounts of 1...
