exam Maths Puzzle Numerical Ability

Find the perimeter and area of a triangle measuring 5x3x4

I think the perimeter = 5x3x4=60
I think the area= 5+3+4=12

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exam Other Question

Ronald wants to sell his care through a broker who charges a commission of 10% of the selling price. Ronald still owes $11.025 on the car. Ronald must get enough to at least pay off the loan. What is the range of selling price? Q1. In how many ways 5 girls & 5 boys can be arranged if at least 3 girls sit together?

Q2. In how many ways 7 girls & 5 boys can be arranged if at least 2 girls sit together?