Q111 of 142 Page 88

A decimal number is multiplied by itself. If the product is 51.84. find the number.

Given:

Let the number is y

Acc. To condition:

y × y = 51.84

⇒ y² = 51.84

Hence, required number is 7.2

109

Find the least square number which is exactly divisible by 3, 4, 5, 6, and 8.

110

Find the length of the side of a square if the length of its diagonal is 10 cm.

112

Find the decimal fraction which when multiplied by itself gives 84.64.

113

A farmer wants to plough his square field of side 150m. How much area will he have to plough?