exam Maths Puzzle Numerical Ability

Please help me I am stuck with this question. Find the volume of a rectangular solid with a length of 3m and a width of 0.9m and a height of 5m.

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exam Other Question

If each side of a square is increased by 5 meters, the area becomes 121 square meters. Find the length of a side of the original square. find the largest two-digit number which is equl to four times the sum of its digits