book Maths Puzzle Numerical Ability

a small plane flying in the same direction as the wind, travelled 600 km in 2 h. The return trip, flying against the wind, took 3 h. Find the speed of the plane and the wind.

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book Other Question

What is the largest rectangular area that can be enclosed with 30 feet of fencing? I need the dimensions. Bob and Moe set off at the same time on a 30 km walk for charity. Bob walks 1.4 km/hr faster than Moe, but stops to talk to a friend for 20 minutes. Even with this delay Bob finish