book Maths Puzzle Numerical Ability

The diagonal of a rectangle is 10 inches and the area is 45 square inches. Find the dimension of the rectangle, correct to one decimal place.

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book Other Question

John leaves his house at 7:30am. His sister,Mary leaves at 8:30am and tries to catch up with John. She is walking 2 km/h faster than him on the same route in the same direction. The 8 people at a party shook hands exactly once with each of the others before the 9th arrived. The 9th person then shook hands with some of these 8 people. A
total of 32 handshakes took place. With how many people did the 9th person shake hands?