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an engine was used to lift up a load of 200kg to a platform 40m high in 20sec. calculate the power out put by the engine (take g =100n /kg).

An aero plane leaves an airport a and flies on a bearing 035° for 1.5 hours at 600km/h to an airport b. It then flies on a bearing 130°for 1.5 hours at 400km/h to an airport Calculate the Distance from c to a,correct to the nearest kilometre. Bearing of c...