Efficiency and ratio | Part 1

Ratio of efficiency of P and Q is 3 : 4. Find the ratio of number of days they will take to complete the work

A takes 16 days to finish a job alone, while B takes 8 days to finish the same-job. What is the ratio of their efficiency and who is less efficient.

The ratio of working efficiency of A and B is 5:3 and the ratio of efficiency of B and C is 5:8. Who is the most efficient?

The efficiency of otto cycle for petrol engine is 50% and the adiabatic constant is 1.4. calculate the compression ratio.

A transformer of efficiency 90% has turns ratio 10 : 1. If the voltage across the primary is 220 V and current in the primary is 0.5 A, then the current in secondary is

Packing Efficiency|Packing Efficiency In SCC|Packing Efficiency In FCC|Packing Efficiency In BCC|Revision|OMR

Answer true or false: If the efficiency of a machine is 100%, the mechanical advantage equals the velocity ratio.