Mathematics

Q81

A man buys calculators at Rs.120 each and sells them at Rs.150 each. What percentage profit does he make?

Q82

Two cyclists start biking from a trail’s start 3 hours apart. The second cyclist travels at 10 mph and starts 3 hours after the first cyclist who is traveling at 6 mph. How much time will pass before the second cyclist catches up (after he starts)?

Q86

Sum of dimensions of cuboid is 19cm and diagonal is 5√5 cm, surface area is

Q87

A hall is 15m long and 12m wide. If floor + ceiling area equals wall area, volume is

Q90

A rectangular field is to be fenced on three sides leaving a side of 20 feet uncovered. If the area is 680 sq.ft, fencing required is

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