Question
A giant circular wheel has a diameter of 63 metres. In
how many revolutions will the wheel cover a total of 79.2 km?Solution
Radius of the giant wheel = 63 Γ· 2 = 31.5 metres Circumference of the giant wheel = 2 Γ Ο Γ radius = 2 Γ (22/7) Γ 31.5 = 198 metres So, number of rotations to cover 79.2 km i.e. 79200 metres = 79200Β Γ· 198 = 400
162 unit of work can be completed by P alone in 27 days. P started working alone and joined by Q after 12 days such that they completed the remaining wo...
βAβ alone can complete a work in 20 days. βBβ alone can complete the same work in 25 days. If βAβ and βBβ work together for 7 days, then...
βAβ can do a piece of work in 20 days. βBβ can do 80% of the same work in 30 days. If they work together for the entire time and get paid Rs.161...
P, Q, and R can do a project individually in 10, 25, and 20 days. P and Q begin the project, but after 2 days, P is replaced by R. How many more days wi...
βAβ can complete a work in 15 days and is 50% more efficient than βBβ. βAβ and βBβ start working together and βAβ leaves after 8 day...
'Aman' and 'Bittu' alone can do some work in 30 days and 45 days, respectively. They work together for eleven days after which both 'Aman' and 'Bittu' a...
βAβ alone can complete a work in 15 days. βBβ alone can complete the same work in 20 days. If βAβ and βBβ work together for 5 days, then...
βAβ can do a piece of work in 10 days. βBβ can do 80% of the same work in 20 days. If they work together for the entire time and get paid Rs.140...
Ravi and Suresh can finish a task alone in 72 days and 96 days respectively. If both work together and earn Rs. 8,400 in total, how much does Ravi rece...
Three machines P,Q and R were hired by a company for a month. Machine P runs 18 hours for 15 days, machine Q runs 20 hours for 18 days and machine R run...
Relevant for Exams:
