Question

Evaluate 70÷√10+√20+√40-√80 if √10=3.16and√5=2.24

Answer 1

GIVEN
70÷√10+√20+√40-√80
= (70 / √10) + 2√5 + 2√10 - 4√5
= (70√10 / 10) + 2√10 - 2√5
= (70√10 + 20√10 - 20√5) / 10
= (90√10 - 20√5) / 10
= 9√10 - 2√5
= (9 x 3.16) - (2 x 2.24)
= 28.44 - 4.48
= 23.96