book Maths Puzzle Numerical Ability

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.

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book Other Question

If twice a certian number is increased by 3, the result is 8 less than threes time a number. Find the number 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.