Quantitative Aptitude - Arithmetic Ability Questions

Which of the following is a true statement?

How many spherical balls of radius 1 cm can be made by melting a hemisphere of radius 6 cm?

What is the diameter (in cm) of a sphere of surface area 6.16 sq cm?

Present age of Ashok is twice the present age of Kishan. After 7 years the Kishan’s age will be 4 times of the Kartik’s present age. If Kartik celebrated his 9thbirthday 3 years ago, then what will be the present age (in years) of Ashok?

If 60 boys can finish a work in 15 days by working 8 hours a day, then how many hours a day should 72 boys work to finish that work within 20 days?

19 x 23 = 437. Then 190 x 0.023 = ?

Which of the following fractions is largest?

If the curved surface area of a right circular cone is 10010 sq cm and its slant height is 91 cm, find its total surface area.