900
1/20
84
The perimeter of a shape is the sum of the lengths of all its sides. In this case, the shape is a rectangle with sides measuring 7cm and 10cm. To find the perimeter, you add up all the sides: 7cm + 7cm + 10cm + 10cm = 34cm. Therefore, the perimeter of this shape is 34cm.
To calculate the cost of 2m 10cm at 40p per meter, first convert 2m 10cm to centimeters. 2m is equal to 200cm, so in total, we have 210cm. Next, divide the total centimeters by 100 to convert to meters, which equals 2.1m. Finally, multiply 2.1m by 40p to find the total cost, which is 84p.
10cm 2l + 2w 4+6=10cm