Ans 1: (Master Answer)
(D): Number of cubes in top layer = 1
Number of cubes in middle layer = 5
Number of cubes in bottom layer = 9
Total number of cubes = 1 + 5 + 9 = 15
(D): Number of cubes in top layer = 1
Number of cubes in middle layer = 5
Number of cubes in bottom layer = 9
Total number of cubes = 1 + 5 + 9 = 15
(B):
Length of rope Sakshi has
= 7 yards = 7 × 3 = 21 feet
Length of rope she needs = 35 feet
So, length of more rope she needs
= (35 - 21) feet = 14 feet.